Pressure reducing valve

Abstract

The utility model provides a pressure reducing valve which comprises a valve body and a valve element, an inlet end is arranged on the valve body, the inlet end is connected with at least two flow dividing pipes, the flow dividing pipes are arranged in the valve body to form at least two flow channels, the valve element is arranged in the flow dividing pipes, at least two sealing plates used for blocking the flow channels are arranged on the valve element, and the sealing plates are arranged on the valve element. And at least two sealing parts matched with the sealing plate are arranged in the flow dividing pipe. The flow in the valve body is increased and the adjusting performance is improved under the condition that the size of the valve body is not changed through the design of the multiple flow dividing pipes, and the valve can be closed and pipelines can be conveniently maintained through the design of the multiple sealing plates on the valve element.

Description

Technical Field

[0001] The utility model relates to the field of valves, in particular to a pressure reducing valve. Background Art

[0002] The traditional pressure reducing valve has a single valve core flow channel adjustment structure, with a small fluid flow rate and poor flow regulation performance. Utility Model Content

[0003] In view of the deficiencies in the prior art, the utility model provides a pressure reducing valve, comprising a valve body and a valve core, the valve body being provided with an inlet end, the inlet end being connected to at least two shunt pipes, the shunt pipes being arranged in the valve body to form at least two flow channels, the valve core being arranged in the shunt pipes, the valve core being provided with at least two sealing plates for blocking the flow channels, and the shunt pipes being provided with at least two sealing parts cooperating with the sealing plates.

[0004] Preferably, it also includes a pressure stabilizing structure, which includes a spring and a diaphragm. The diaphragm is arranged in the valve body to divide the inner part of the valve body into a pressure stabilizing chamber and a pressure reducing chamber. The shunt pipe is arranged in the pressure reducing chamber. The spring is arranged in the pressure stabilizing chamber and resists the diaphragm.

[0005] Preferably, the voltage stabilizing structure further includes an adjusting bolt, a support frame is connected to the diaphragm, the spring is against the support frame, and the adjusting bolt is connected to the support frame to adjust the compression amount of the support frame on the spring.

[0006] Preferably, two sealing plates are provided, including sealing plate 1 and sealing plate 2, the valve core includes a lower valve stem, an upper valve stem, a valve stem seat, a first sealing ring and a second sealing ring, sealing plate 1 and sealing plate 2 are fixed on the lower valve stem, a stud is provided at the bottom of the lower valve stem, a threaded hole is provided on the valve stem seat, a sealing countersunk hole is coaxially provided on the top of the threaded hole, an inclined surface shrinking from top to bottom is provided on the outer wall of sealing plate 1, the first sealing ring is provided in the sealing countersunk hole, after the lower valve stem is connected to the valve stem seat, the inclined surface and the sealing countersunk hole position the first sealing ring, a sealing groove is provided on the top of sealing plate 2, a limiting groove is provided on the bottom surface of the upper valve stem, the second sealing ring is provided in the sealing groove, and when the upper valve stem is connected to the lower valve stem, the second sealing ring is limited between the sealing groove and the limiting groove.

[0007] Preferably, two shunt pipes are provided, the inlet end and the two shunt pipes form a T-shaped structure, and the side walls at the ends of the two shunt pipes are provided with notches for the medium to flow.

[0008] Preferably, the support frame includes an upper clamping plate, a lower clamping plate and a nut. The diaphragm, the upper clamping plate and the lower clamping plate are all provided with through holes for the upper valve stem to pass through. The diaphragm is arranged between the upper clamping plate and the lower clamping plate. The top of the upper valve stem shrinks inward to form a step for clamping the support frame. The top of the upper valve stem is provided with an external thread adapted to the nut. After the support frame and the diaphragm are clamped on the step, the nut locks the support frame and the diaphragm.

[0009] The beneficial effects of the utility model include: through the design of multiple shunt pipes, the flow rate in the valve body is increased without changing the volume of the valve body, thereby improving the regulating performance; through the design of multiple sealing plates on the valve core, the valve can be closed, thereby facilitating maintenance of the pipeline. BRIEF DESCRIPTION OF THE DRAWINGS

[0010] Figure 1 This is the structural diagram when the valve core is closed;

[0011] Figure 2 This is the structural diagram when the valve core is open;

[0012] Figure 3 for Figure 2 Magnified view of the marked area;

[0013] Figure 4 It is the structural diagram of the top shunt pipe;

[0014] Figure 5 This is the structural diagram of the bottom shunt pipe. DETAILED DESCRIPTION

[0015] The present invention will be further described below with reference to the embodiments shown in the accompanying drawings.

[0016] See also Figure 1-Figure 5 The utility model provides a pressure reducing valve, including a valve body 1 and a valve core. The valve body 1 is provided with an inlet end 11, and the inlet end 11 is connected to at least two shunt pipes 12. The shunt pipes 12 are arranged in the valve body 1 to form at least two flow channels. The valve core is arranged in the shunt pipe 12, and at least two sealing plates for blocking the flow channels are arranged on the valve core. At least two sealing parts 13 cooperating with the sealing plates are arranged in the shunt pipe 12.

[0017] Through the design of multiple shunt pipes 12, the flow rate in the valve body 1 is increased without changing the volume of the valve body 1, thereby improving the regulating performance. Through the design of multiple sealing plates on the valve core, the valve can be closed, thereby facilitating maintenance of the pipeline.

[0018] Furthermore, it also includes a pressure stabilizing structure, which includes a spring 2 and a diaphragm 3. The diaphragm 3 is arranged in the valve body 1 to divide the interior of the valve body 1 into a pressure stabilizing chamber and a pressure reducing chamber. The shunt pipe 12 is arranged in the pressure reducing chamber, and the spring 2 is arranged in the pressure stabilizing chamber and against the diaphragm 3.

[0019] Through the design of the diaphragm 3 and the spring 2, the pressure in the decompression chamber can be dynamically adjusted to keep the pressure at the outlet relatively stable, thereby avoiding excessive pressure changes at the outlet and affecting the normal delivery of the medium.

[0020] Furthermore, the voltage stabilizing structure also includes an adjusting bolt 4 , a support frame 5 is connected to the diaphragm 3 , the spring 2 is abutted against the support frame 5 , and the adjusting bolt 4 is connected to the support frame 5 to adjust the compression amount of the support frame 5 on the spring 2 .

[0021] The compression amount of the spring 2 is adjusted by adjusting the bolt 4, and the pressure of the spring 2 on the diaphragm 3 is adjusted, thereby changing the pressure change value inside the valve body 1, so that the pressure reducing valve can adapt to more working conditions.

[0022] Furthermore, two sealing plates are provided, including a sealing plate 1 61 and a sealing plate 2 62. The valve core includes a lower valve stem 71, an upper valve stem 72, a valve stem seat 73, a first sealing ring 74 and a second sealing ring 75. The sealing plate 1 61 and the sealing plate 2 62 are fixed on the lower valve stem 71. A stud 76 is provided at the bottom of the lower valve stem 71. A threaded hole is provided on the valve stem seat 73. A sealing countersunk hole 77 is coaxially provided at the top of the threaded hole. The outer wall of the sealing plate 1 61 is provided with a sealing plate 78 extending from top to bottom. The first sealing ring 74 is arranged in the sealing countersunk hole 77 with the downward contracted inclined surface 78. After the lower valve stem 71 is connected to the valve stem seat 73, the inclined surface 78 and the sealing countersunk hole 77 position the first sealing ring 74. A sealing groove 79 is arranged on the top of the sealing plate 62. A limiting groove 70 is provided on the bottom surface of the upper valve stem 72. The second sealing ring 75 is arranged in the sealing groove 79. When the upper valve stem 72 is connected to the lower valve stem 71, the second sealing ring 75 is limited between the sealing groove 79 and the limiting groove 70.

[0023] The first sealing ring 74 is fixed by the valve stem seat 73 and the lower valve stem 71, and the second sealing ring 75 is fixed by the upper valve stem 72 and the lower valve stem 71, so that the first sealing ring 74 and the second sealing ring 75 are fixed on the valve core, which facilitates the installation of the first sealing ring 74 and the second sealing ring 75. During the installation process, the sealing ring does not deform too much, thereby avoiding failure of the sealing ring due to excessive deformation.

[0024] Furthermore, the support frame 5 includes an upper clamping plate 51, a lower clamping plate 52 and a nut 53. The diaphragm 3, the upper clamping plate 51 and the lower clamping plate 52 are all provided with through holes for the upper valve stem 72 to pass through. The diaphragm 3 is arranged between the upper clamping plate 51 and the lower clamping plate 52. The top of the upper valve stem 72 shrinks inward to form a step for clamping the support frame 5. The top of the upper valve stem 72 is provided with an external thread adapted to the nut 53. After the support frame 5 and the diaphragm 3 are clamped on the step, the nut 53 locks the support frame 5 and the diaphragm 3.

[0025] The valve core and the diaphragm 3 are connected by the above structure, which has a simple structure and is easy to manufacture.

[0026] Furthermore, two shunt pipes 12 are provided, and the inlet end 11 and the two shunt pipes 12 form a T-shaped structure. The side walls at the ends of the two shunt pipes 12 are provided with notches 14 for medium flow.

[0027] The design of the notch 14 ensures that the medium can flow normally when the valve core is opened, and enables the shunt pipe 12 to guide the movement direction of the valve core.

[0028] The above are only preferred implementations of the utility model. The protection scope of the utility model is not limited to the above embodiments. All technical solutions under the idea of ​​the utility model belong to the protection scope of the utility model. It should be pointed out that for ordinary technicians in this technical field, some improvements and modifications without departing from the principle of the utility model should also be regarded as the protection scope of the utility model.

Claims

1. A pressure reducing valve, characterized in that: The invention comprises a valve body (1) and a valve core, wherein the valve body (1) is provided with an inlet end (11), the inlet end (11) is connected to at least two flow diversion pipes (12), the flow diversion pipes (12) are arranged in the valve body (1) to form at least two flow passages, the valve core is arranged in the flow diversion pipes (12), the valve core is provided with at least two sealing plates for blocking the flow passages, and the flow diversion pipes (12) are provided with at least two sealing parts (13) cooperating with the sealing plates.

2. A pressure reducing valve according to claim 1, characterized in that: It also includes a pressure stabilizing structure, the pressure stabilizing structure including a spring (2) and a diaphragm (3), the diaphragm (3) being arranged in the valve body (1) to divide the interior of the valve body (1) into a pressure stabilizing chamber and a pressure reducing chamber, the shunt pipe (12) being arranged in the pressure reducing chamber, and the spring (2) being arranged in the pressure stabilizing chamber and abutting against the diaphragm (3).

3. A pressure reducing valve according to claim 2, characterized in that: The voltage stabilizing structure further comprises an adjusting bolt (4), a support frame (5) is connected to the diaphragm (3), the spring (2) and the support frame (5) are in contact with each other, and the adjusting bolt (4) is connected to the support frame (5) to adjust the compression amount of the spring (2) by the support frame (5).

4. A pressure reducing valve according to claim 3, characterized in that: The sealing plates are provided in two pieces, including sealing plate 1 (61) and sealing plate 2 (62). The valve core includes a lower valve stem (71), an upper valve stem (72), a valve stem seat (73), a first sealing ring (74) and a second sealing ring (75). The sealing plate 1 (61) and the sealing plate 2 (62) are fixed on the lower valve stem (71). A stud (76) is provided at the bottom of the lower valve stem (71). A threaded hole is provided on the valve stem seat (73). A sealing countersunk hole (77) is coaxially provided on the top of the threaded hole. A sealing countersunk hole (77) is provided on the outer wall of the sealing plate 1 (61) that contracts from top to bottom. The first sealing ring (74) is arranged in the sealing counterbore (77). After the lower valve stem (71) is connected to the valve stem seat (73), the first sealing ring (74) is positioned by the inclined surface (78) and the sealing counterbore (77). The top of the second sealing plate (62) is provided with a sealing groove (79). The bottom surface of the upper valve stem (72) is provided with a limiting groove (70). The second sealing ring (75) is arranged in the sealing groove (79). When the upper valve stem (72) is connected to the lower valve stem (71), the second sealing ring (75) is limited between the sealing groove (79) and the limiting groove (70).

5. A pressure reducing valve according to claim 4, characterized in that: Two diverter pipes (12) are provided, the inlet end (11) and the two diverter pipes (12) form a T-shaped structure, and the side walls at the ends of the two diverter pipes (12) are provided with notches (14) for medium circulation.

6. A pressure reducing valve according to claim 4, characterized in that: The support frame (5) comprises an upper clamping plate (51), a lower clamping plate (52) and a nut (53); the diaphragm (3), the upper clamping plate (51) and the lower clamping plate (52) are all provided with through holes for the upper valve stem (72) to pass through; the diaphragm (3) is arranged between the upper clamping plate (51) and the lower clamping plate (52); the top of the upper valve stem (72) is retracted inwardly to form a step for clamping the support frame (5); the top of the upper valve stem (72) is provided with an external thread adapted to the nut (53); after the support frame (5) and the diaphragm (3) are clamped on the step, the nut (53) locks the support frame (5) and the diaphragm (3).

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