High-flow piston type pressure reducing valve

Abstract

The utility model discloses a large-flow piston type pressure reducing valve which comprises a valve body, a valve element assembly and a fixing assembly. A water inlet and a water outlet are formed in the valve body. A valve element sleeve is arranged in the valve body, a water outlet cavity communicated with the water outlet is formed between the valve element sleeve and the valve body, and a water through hole is formed in the valve body. The valve body is further provided with an inclined water inlet hole, the inclined water inlet hole enables the water passing hole to be communicated with the water inlet, the valve body is provided with an upper sealing ring and an inclined sealing ring, and the upper sealing ring and the inclined sealing ring enable the upper side and the lower side of the inclined water inlet hole to be sealed with the valve body. Due to the fact that the inclined cutting sealing design is adopted for the water flow of the inclined water inlet hole, the water flow of the inclined water inlet hole is not lower than that of the water inlet design, outlet water is not affected when flowing out of the water outlet, the problem that the flow capacity is occupied by the structure is solved, the flow capacity is improved, the flow capacity can be doubled at least under the condition of the same product, and the service life of the product is prolonged. The problem of excessive loss of pipeline flow caused by the flow capacity of the pressure reducing valve in the actual water using process is solved.

Description

Technical Field

[0001] The utility model relates to the technical field of pressure reducing valves, in particular to a large-flow piston type pressure reducing valve. Background Art

[0002] The pressure reducing valve is an intelligent valve that uses the energy of the medium itself to adjust and control the pipeline pressure. It is used in domestic water supply, fire water supply and other industrial water supply systems. Through the self-regulation of the pressure reducing valve, the outlet pressure of the pipeline does not change due to changes in the inlet pressure and inlet flow, and the outlet pressure is safely and reliably maintained at the set value. The set value can be adjusted as needed to achieve the purpose of pressure reduction.

[0003] For example, Chinese patent application number 202221413039.2 discloses a piston pressure reducing valve, comprising a valve body (1) having a water inlet end (1a) and a water outlet end (1b), and a piston pressure regulating assembly (2) arranged in the valve body (1), wherein the outer side of the piston pressure regulating assembly (2) has a guide portion (2a1) matched with the inner wall of the valve body (1), and the outer side of the guide portion (2a1) is provided with a sealing member (4) abutting against the inner wall of the valve body (1) to form a seal, wherein: The guide portion (2a1) is also provided with a seal part 2 (5) and a seal part 3 (6) on the outside. The seal part 2 (5) is located between the seal part 1 (4) and the seal part 3 (6). The seal part 2 (5) has a seal part 2 (5a) on the side close to the seal part 1 (4), whose outer edge abuts against the inner wall of the valve body (1). The seal part 2 (5a) has a groove 2 (5a1) with a notch facing the seal part 1 (4). The seal part 3 (6) has a seal part 3 (6a) on the side close to the seal part 2 (5), whose outer edge abuts against the inner wall of the valve body (1). The seal part 3 (6a) has a groove 3 (6a1) with a notch facing the seal part 2 (5). Both the seal part 2 (5a) and the seal part 3 (6a) have elastic deformation capabilities and the hardness of the seal part 2 (5a) is greater than that of the seal part 3 (6a).

[0004] Another example is Chinese patent application No. 202122651091.3, a pilot piston pressure reducing valve, comprising a main valve and a pilot valve, wherein the main valve comprises a valve body (1) and an upper cover (2) and a lower cover (3) respectively located at the top and bottom of the valve body (1), wherein a flow channel extending from left to right is provided in the valve body (1), wherein a main valve seat (4) is provided in the middle of the flow channel, wherein the main valve seat (4) divides the flow channel into two parts, namely, an inlet chamber (22) and an outlet chamber (23), wherein a cylinder body (5) is provided above the main valve seat (4), wherein a piston (6) and a valve stem (7) are installed on the cylinder body (5), and the valve stem (7) is provided at the bottom of the valve body (1). ) is fixedly connected to a main valve flap (8) for cooperating with a main valve seat (4) to achieve sealing, a main valve spring (9) is installed between the main valve flap (8) and the lower cover (3), the pilot valve is installed in the upper cover (2), the pilot valve comprises a pilot valve seat (10), a pilot valve flap (11) for cooperating with the pilot valve seat (10) to achieve sealing, and a pilot valve spring (12) located below the pilot valve flap (11), a flange cover (13) is fixedly installed above the upper cover (2), and an adjusting spring (14) is arranged in the flange cover (13), The lower end of the regulating spring (14) is provided with a pressure plate (15) for pressing the pilot valve flap (11) to realize opening and closing, and the top of the flange cover (13) is threadedly connected with an adjusting screw (16) for adjusting the pressure of the regulating spring (14) to set the outlet pressure, characterized in that: the inlet chamber (22) and the outlet chamber (23) are respectively provided with an inlet pilot channel (20) and an outlet pilot channel (21) connected to the pilot valve, and the inlet pilot channel (20) and the outlet pilot channel (21) are respectively fixedly provided An inlet pressure sensor (24) and an outlet pressure sensor (25) are provided; an electric actuator (26) for controlling the forward and reverse rotation of the adjusting screw (16) is fixedly installed above the flange cover (13); a wireless remote monitoring module (27) for collecting pressure data and setting the outlet pressure is fixedly installed on the side wall of the flange cover (13); the inlet pressure sensor (24), the outlet pressure sensor (25) and the electric actuator (26) are all electrically connected to the wireless remote monitoring module (27).

[0005] The application number of our company is 201020250302.1, a pressure reducing valve, comprising a valve body (1) having a water inlet (11) and a water outlet (12), the valve body (1) also having a valve core seat (13), a valve flap assembly being arranged in the valve body (1), characterized in that a valve core (2) is arranged in the valve core seat (13), the valve flap assembly can move up and down along the valve core (2) under the action of a pressure regulating assembly, and a water passage (5) is formed between the valve flap assembly and the valve core (2) which can change the water flow rate when the valve flap assembly moves up and down.

[0006] The above-mentioned patented structures all have common usage defects. The sealing structure of traditional pressure reducing valves is that the valve core is horizontal and vertical, so the structure limits the water flow of the product. That is, a water inlet and a water outlet are provided on the valve body, and the water inlet and the water outlet are connected to the middle valve core. However, the through hole connected to the middle valve core will be reduced to about half the size of the water inlet and the water outlet. Due to structural limitations, the flow capacity of the entire product is reduced by half, resulting in excessive loss of pipeline flow due to the flow capacity of the pressure reducing valve during actual water use. Therefore, it is very necessary to improve the defects of the existing pressure reducing valves. Summary of the invention

[0007] The purpose of the utility model is to solve the problems raised in the above background technology and provide a large flow piston type pressure reducing valve.

[0008] In order to solve the above technical problems, the technical solution of the utility model is: a large-flow piston-type pressure reducing valve, comprising a valve body, a valve core assembly, and a fixing assembly, wherein a water inlet and a water outlet are arranged on the valve body; a valve core sleeve is arranged in the valve body, the valve core sleeve is positioned and installed and connected to the valve body, and a water outlet cavity communicated with the water outlet is formed between the valve body and the valve body, a water through hole is arranged in the valve body, the valve core assembly is installed in the valve core sleeve, and controls the connection and disconnection of the water through hole and the water outlet cavity; an oblique water inlet hole is also arranged on the valve body, the oblique water inlet hole connects the water through hole with the water inlet, an upper sealing ring and an oblique sealing ring are respectively arranged on the valve body, the upper sealing ring and the oblique sealing ring form a seal between the upper and lower sides of the oblique water inlet hole and the valve body, thereby forming an isolation seal between the oblique water inlet hole and the water outlet cavity and the water outlet.

[0009] In the above-mentioned large-flow piston-type pressure reducing valve, an oblique positioning sealing boss is provided on the outer wall of the valve body along the edge of the oblique water inlet hole, an oblique positioning sealing boss is provided with an oblique sealing groove, and an oblique sealing ring is installed in the oblique sealing groove.

[0010] In the above-mentioned large-flow piston-type pressure reducing valve, an upper sealing groove is further provided on the valve body, and an upper sealing ring is installed in the upper sealing groove.

[0011] In the above-mentioned large-flow piston-type pressure reducing valve, the water flow rate of the oblique water inlet hole is not less than the water flow rate of the water inlet.

[0012] In the above-mentioned large-flow piston-type pressure reducing valve, the lower port slope of the oblique water inlet hole and the central axis of the water inlet have an included angle α, and the included angle α is not less than 30 degrees.

[0013] In the above-mentioned large-flow piston-type pressure reducing valve, the upper port side of the oblique water inlet hole is arranged parallel to the central axis of the water inlet.

[0014] In the above-mentioned large-flow piston-type pressure reducing valve, the lower port inclined surface of the inclined water inlet hole and the inclined positioning sealing boss together form a water inlet transition inclined surface.

[0015] The utility model has the following beneficial effects:

[0016] The utility model designs an oblique cutting sealing structure on the valve core sleeve. The water flow rate of the oblique water inlet hole is not lower than the water inlet design due to the oblique cutting sealing design. After the water flows out of the valve core sleeve, it is connected with the water outlet through the water outlet cavity. The water is not affected when flowing out of the water outlet. Compared with the existing structure, the problem of structural occupation of flow capacity is solved and the flow capacity is increased. Under the same product condition, the flow capacity can be at least doubled, which solves the excessive loss of pipeline flow due to the flow capacity of the pressure reducing valve in actual water use. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a planar cross-sectional view of the utility model;

[0018] Figure 2 It is a three-dimensional cross-sectional view of the utility model;

[0019] Figure 3 It is a three-dimensional diagram of the valve core sleeve in the utility model. DETAILED DESCRIPTION

[0020] The utility model is further described in conjunction with the accompanying drawings.

[0021] See also Figures 1 to 3 The utility model provides a large flow piston pressure reducing valve, including a valve body 1, a valve core assembly 2, and a fixing assembly 3. The valve body 1 is provided with a water inlet 4 and a water outlet 5; a valve core sleeve 6 is provided in the valve body 1, the valve core sleeve 6 is positioned and installed in the valve body 1, and a water outlet cavity 7 communicated with the water outlet 5 is formed between the valve body 1 and the fixing assembly 3. The valve core sleeve 6 and the valve core assembly 2 are positioned and connected. A water through hole 8 is provided in the valve body 1. The valve core assembly 2 is installed in the valve core sleeve 6 and controls the water through hole. 8 and the opening and closing of the water outlet chamber 7; the valve body 1 is also provided with an oblique water inlet hole 9, which connects the water hole 8 with the water inlet 4, and the water flow rate of the oblique water inlet hole 9 is not less than the water flow rate of the water inlet 4. The valve body 1 is respectively provided with an upper sealing ring 10 and an oblique sealing ring 11. The upper sealing ring 10 and the oblique sealing ring 11 form a seal between the upper and lower sides of the oblique water inlet hole 9 and the valve body 1, thereby forming an isolation seal between the oblique water inlet hole 9 and the water outlet chamber 7 and the water outlet 5.

[0022] The oblique water inlet hole 9 is formed by oblique cutting on the valve core sleeve, and the upper sealing ring 10 and the oblique sealing ring 11 are sealing structures matched with the upper and lower sides of the oblique water inlet hole 9. Therefore, the water entering the valve core sleeve 6 through the oblique water inlet hole 9 from the water inlet 4 is sealed and isolated from the water outlet cavity 7. The oblique cutting sealing design of the oblique water inlet hole 9 makes its water flow rate not lower than the water inlet 4, and the water outlet cavity 7 formed between the valve core sleeve 6 and the valve body 1 is connected with the water outlet 5, and the water is not affected when flowing out of the water outlet; thereby solving the problem of structural occupation of flow capacity and increasing the flow capacity. Under the same product conditions, the flow capacity can be at least doubled, solving the excessive loss of pipeline flow due to the flow capacity of the pressure reducing valve during actual water use.

[0023] Furthermore, an oblique positioning sealing boss 12 is provided on the outer wall of the valve body 1 along the edge of the oblique water inlet hole 9, and an oblique sealing groove 13 is provided on the oblique positioning sealing boss 12, and an oblique sealing ring 11 is installed in the oblique sealing groove 13; an upper sealing groove 14 is also provided on the valve body 1, and an upper sealing ring 10 is installed in the upper sealing groove 14; thereby cooperating with the oblique water inlet hole 9 to complete the sealing between the valve body 1, thereby ensuring the isolation seal between the oblique water inlet hole 9 and the water outlet cavity 7 and the water outlet 5.

[0024] Preferably, the lower port slope of the oblique water inlet hole 9 has an angle α with the central axis of the water inlet 4, and the angle α is not less than 30 degrees. The upper port side of the oblique water inlet hole 9 is arranged parallel to the central axis of the water inlet 4. Experiments have shown that this design can minimize the resistance of fluid entering and passing through, which is conducive to pressure reduction balance regulation.

[0025] Furthermore, the size of the angle α between the lower port slope of the inclined water inlet hole 9 and the central axis of the water inlet 4 can be changed according to the model of the specific product. Of course, this is not a design restriction on the size of the angle α. In some products, the angle α can also be designed to be less than 30 degrees. At the same time, the upper port side of the inclined water inlet hole 9 and the central axis of the water inlet 4 do not necessarily have to be set parallel.

[0026] Furthermore, the lower port slope of the oblique water inlet hole 9 and the oblique positioning sealing boss 12 together form a water inlet transition slope 15. The formation of the water inlet transition slope 15 can further cooperate to reduce the resistance of fluid entering and passing through, and better contribute to the pressure reduction balance adjustment.

[0027] The above is a detailed introduction to a large-flow piston-type pressure reducing valve provided by an embodiment of the utility model. Specific examples are used in this article to illustrate the principle and implementation method of the utility model. The description of the above embodiments is only used to help understand the technical solution disclosed by the utility model; at the same time, for general technicians in this field, according to the idea of ​​the utility model, there will be changes in the specific implementation method and application scope. In summary, the content of this specification should not be understood as a limitation of the utility model.

Claims

1. A large flow piston type pressure reducing valve, comprising a valve body (1), a valve core assembly (2), and a fixing assembly (3), wherein the valve body (1) is provided with a water inlet (4) and a water outlet (5); the characteristics are: The valve body (1) is provided with a valve core sleeve (6), which is positioned and installed in the valve body (1) and forms a water outlet cavity (7) between the valve core sleeve (6) and the valve body (1) and which is in communication with the water outlet (5). The valve body (1) is provided with a water through hole (8), and the valve core assembly (2) is installed in the valve core sleeve (6) and controls the opening and closing of the water through hole (8) and the water outlet cavity (7). The valve body (1) is also provided with an oblique water inlet hole (9), which connects the water through hole (8) with the water inlet (4). The valve body (1) is respectively provided with an upper sealing ring (10) and an oblique sealing ring (11), which form a seal between the upper and lower sides of the oblique water inlet hole (9) and the valve body (1), thereby forming an isolation seal between the oblique water inlet hole (9) and the water outlet cavity (7) and the water outlet (5).

2. A large flow piston type pressure reducing valve according to claim 1, characterized in that: An oblique positioning sealing boss (12) is provided on the outer wall of the valve body (1) along the edge of the oblique water inlet hole (9), an oblique sealing groove (13) is provided on the oblique positioning sealing boss (12), and an oblique sealing ring (11) is installed in the oblique sealing groove (13).

3. A large flow piston type pressure reducing valve according to claim 1, characterized in that: The valve body (1) is also provided with an upper sealing groove (14), and the upper sealing ring (10) is installed in the upper sealing groove (14).

4. A large flow piston type pressure reducing valve according to claim 3, characterized in that: The water flow rate of the oblique water inlet hole (9) is not less than the water flow rate of the water inlet (4).

5. A large flow piston type pressure reducing valve according to claim 1 or 4, characterized in that: The lower port inclined surface of the inclined water inlet hole (9) and the central axis of the water inlet (4) form an angle α, and the angle α is not less than 30 degrees.

6. A large flow piston type pressure reducing valve according to claim 5, characterized in that: The side surface of the upper port of the oblique water inlet hole (9) is arranged parallel to the central axis of the water inlet (4).

7. A large flow piston type pressure reducing valve according to claim 2, characterized in that: The lower port inclined surface of the inclined water inlet hole (9) and the inclined positioning sealing boss (12) together form a water inlet transition inclined surface (15).

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