Automatic constant pressure type pressure reducing valve

Abstract

The utility model discloses an automatic constant-pressure type pressure reducing valve which comprises a pressure reducing valve body, valve seats are fixedly connected to the middle of the interior of the pressure reducing valve body, a valve element is arranged between the valve seats, a fixing rod is fixedly connected to the middle of the valve element, and a valve rod is connected to the top of the fixing rod. A hand wheel meshed with the valve rod gear is arranged in the middle of the outer side of the pressure reducing valve body. Flange plates are fixedly connected to the two ends of the pressure reducing valve body, one ends of tension springs are axially and evenly fixed to the inner wall of the flange plate located at the inlet end of the pressure reducing valve body, the other ends of the tension springs are connected with a circular damping plate, a funnel-shaped water outlet is formed in the middle of the damping plate, and a plurality of through holes are evenly formed in the damping plate in the circumferential direction. A matching block used for being matched with the water outlet in an inserted mode is further arranged on one side of the valve seat. When a water source circulates through the pressure reducing valve body, after the water pressure is controlled, the water pressure of the outer side of the damping plate is large, the tension spring elastically stretches, then the water outlet and the matching block are matched in an inserted mode, the abutting effect is completed, and the high water pressure of the water source is controlled.

Description

Technical Field

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

[0002] A pressure reducing valve reduces inlet pressure to a set outlet pressure through regulation, automatically maintaining a stable outlet pressure by relying on the energy of the medium itself. From a fluid mechanics perspective, a pressure reducing valve is a throttling element with variable local resistance. This means that by varying the throttling area, the flow rate and kinetic energy of the fluid are altered, resulting in varying pressure losses, thereby achieving the purpose of reducing pressure. The control and regulation system then balances outlet pressure fluctuations with the spring force, maintaining a constant outlet pressure within a certain tolerance.

[0003] The pressure reducing valve in the prior art needs to manually control the distance between the valve core and the valve seat during use to complete the pressure reducing and circulation function. However, when the water pressure is high, it will cause certain damage to the internal structure of the valve body. At the same time, the traditional pressure reducing valve is not convenient for constant pressure control according to the water pressure, causing damage and affecting the service life. Utility Model Content

[0004] The purpose of the utility model is to overcome the deficiencies in the prior art and to provide an automatic constant-pressure pressure reducing valve. When the water pressure is relatively high, it will have an impact on the damping plate, and the tension spring will be elastically stretched. Subsequently, the water outlet and the matching block will be plugged in and matched to complete the resistance effect, thereby controlling the strong water pressure of the water source and reducing the impact damage to the pressure reducing valve body. The water pressure can also be discharged slowly through the through hole.

[0005] The purpose of this utility model is achieved through the following technical solutions:

[0006] An automatic constant pressure reducing valve comprises: a reducing valve body, a valve seat is fixedly connected to the middle position of the inner part of the reducing valve body, a valve core is arranged between the valve seats, a fixing rod is fixedly connected to the middle part of the valve core, and the top of the fixing rod is connected to the valve stem; a handwheel is provided at the middle part of the outer side of the reducing valve body, and a rotating rod is provided on the handwheel and meshed with the valve stem gear; flanges are fixedly connected to both ends of the reducing valve body, one end of a tension spring is evenly fixed axially on the inner wall of the flange located at the inlet end of the reducing valve body, and the other end of the tension spring is connected to a circular damping plate, a funnel-shaped water outlet is provided in the middle part of the damping plate, and a plurality of through holes are evenly arranged circumferentially on the damping plate; a matching block for plugging and matching with the water outlet is also provided on the valve seat.

[0007] Furthermore, a groove is provided at the top of the fixing rod, and a latch block is provided at the bottom of the valve stem that fits into the groove. After the latch block is inserted into the groove, it is fastened by a bolt passing through the fixing rod, the groove and the latch block, and sealing plugs are clamped at both ends of the bolt.

[0008] Furthermore, a sealing wrapping layer is fixedly connected to the outer side of the valve core, and a sealing gasket is fixedly connected to the inner side of the valve seat, and the sealing gasket and the sealing wrapping layer can achieve sealing cooperation.

[0009] Furthermore, a first pressure gauge is fixedly connected to one side of the top end of the pressure reducing valve body, and a second pressure gauge is fixedly connected to the other side of the top end of the pressure reducing valve body.

[0010] Furthermore, one end of the rotating rod is fixedly connected to the handwheel, and the other end is provided with a spur gear. The top of the valve stem is provided with a spur rack. The spur gear and the spur rack are meshed and connected, and the lifting and lowering control of the valve stem is achieved by rotating the handwheel.

[0011] Furthermore, the matching block is arranged on a side of the valve seat close to the damping plate.

[0012] Compared with the prior art, the beneficial effects brought about by the technical solution of the utility model are:

[0013] 1. Automatic Constant Pressure Control: This utility model achieves automatic constant pressure regulation of water pressure by incorporating a damping plate, tension spring, water outlet, and mating block. As water flows through the pressure reducing valve body, the damping plate shifts in response to high water pressure. The elastic stretching of the tension spring and the plug-in connection between the water outlet and mating block effectively resist the impact of excessive water pressure, preventing damage to the valve body. Furthermore, the provision of through-holes helps alleviate water pressure, ensuring a smoother discharge flow. This achieves a stable automatic constant pressure effect and reduces the impact of water pressure fluctuations on pipes and equipment.

[0014] 2. Improved Sealing and Durability: In this design, the sealing layer on the exterior of the valve core and the sealing gasket on the interior of the valve seat tightly mate to ensure excellent sealing performance. This sealing layer effectively prevents impurities in the water source (such as sand and gravel) from entering between the valve core and the valve seat, preventing damage or dents to the valve core, thereby ensuring the long-term stable operation and pressure-reducing effect of the pressure reducing valve. Especially during long-term use, the tight fit between the valve core and the valve seat, connected by bolts and sealing plugs, makes it easy to disassemble, replace, and maintain, extending the service life of the pressure reducing valve.

[0015] 3. Optimized Structure and Ease of Operation: The design of this utility model facilitates removal and maintenance of the valve core and valve seat through the coordinated use of the fixing rod, valve stem, latch block, and bolts. The handwheel and pressure gauge facilitate adjustment of the pressure reducing valve and water pressure monitoring, ensuring real-time adjustment and stable operation of the system. The flange connection design makes installation and removal of the pressure reducing valve easier, adapting to the needs of various piping systems.

[0016] 4. Enhanced protection: The combination of the tension spring and damping plate not only provides an effective reset function, but also reduces vibration caused by water pressure fluctuations through elastic stretching, preventing long-term damage to the pressure reducing valve. The plug-in function of the matching block and the water outlet helps further stabilize the water flow, reduce the impact of water pressure fluctuations on the valve body, and extend the service life of the pressure reducing valve.

[0017] Through the above-mentioned optimized design, the utility model can maintain a stable pressure reduction effect even when the water pressure fluctuates greatly, effectively reduce equipment damage and improve the overall durability of the system. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 This is a front cross-sectional structural diagram of the automatic constant pressure reducing valve of the present utility model;

[0019] Figure 2 This is a three-dimensional structural diagram of the damping plate in the automatic constant pressure reducing valve of the utility model;

[0020] Figure 3 for Figure 1 A in the figure shows the enlarged structure;

[0021] Figure 4 This is a schematic diagram of the enlarged structure of the fixed rod and valve stem of the automatic constant pressure reducing valve of the utility model.

[0022] Figure numerals: 1. Pressure reducing valve body; 2. Valve core; 3. Sealing gasket; 4. Valve seat; 5. First pressure gauge; 6. Handwheel; 7. Second pressure gauge; 8. Damping plate; 9. Water outlet; 10. Through hole; 11. Matching block; 12. Tension spring; 13. Fixing rod; 14. Valve stem; 15. Sealing plug; 16. Pin block; 17. Sealing wrapping layer. DETAILED DESCRIPTION

[0023] The following is a further detailed description of the present invention in conjunction with the accompanying drawings and specific embodiments. This section will describe the specific embodiments of the present invention in detail. The preferred embodiments of the present invention are shown in the accompanying drawings. The purpose of the accompanying drawings is to supplement the description in the text of the specification with graphics, so that people can intuitively and vividly understand each technical feature and overall technical solution of the present invention. However, they should not be construed as limiting the scope of protection of the present invention.

[0024] Reference Figure 1-4The embodiment of the present invention is an automatic constant pressure reducing valve, comprising: a pressure reducing valve body 1, a valve seat 4 is fixedly connected at the middle position inside the pressure reducing valve body 1, a valve core 2 is arranged between the valve seats 4, and the water source is circulated through the distance between the valve seat 4 and the valve core 2, and is discharged through the other end of the pressure reducing valve body 1, and the discharged water source is controlled by the flow rate of the distance between the valve seat 4 and the valve core 2, thereby maintaining the required discharge pressure. A fixing rod 13 is fixedly connected to the middle of the valve core 2. In this embodiment, the fixing rod 13 passes through the middle of the valve core 2 and is fixedly connected to the valve core 2. The fixing rod 13 and the valve stem 14 play a connecting role, which is convenient for installation and disassembly, and for subsequent damage replacement. The valve stem 14 is matched with the top of the fixing rod 13, and the bottom end of the valve stem 14 is fixedly connected with a latch block 16. The latch block 16 can be used to connect the fixing rod 13, the latch block 16 and the valve stem 14, which is more firm, and the latch block 16 and the fixing rod 13 are plugged together.

[0025] In this embodiment, a groove is provided on the top of the fixing rod 13, and a latch block 16 is provided at the bottom of the valve stem 14 that fits with the groove. After the latch block 16 is inserted into the groove, it is fastened by passing through the fixing rod 13, the groove and the latch block 16 through a bolt. Sealing plugs 15 are clamped at both ends of the bolt. The sealing plugs 15 increase the sealing effect, reduce the erosion of the water source, and affect the subsequent disassembly problem. The outer side of the valve core 2 is fixedly connected with a sealing wrapping layer 17, and the inner side of the valve seat 4 is fixedly connected with a sealing gasket 3. The sealing gasket 3 and the sealing wrapping layer 17 have a buffering effect. When encountering impurities and sand and gravel, elastic back pressure can be exerted to prevent damage to the valve core 2, and the sealing gasket 3 and the sealing wrapping layer 17 are sealed.

[0026] Both ends of the pressure reducing valve body 1 are fixedly connected with flanges, and one end of a tension spring 12 is fixedly connected to the inner wall of the flange at the water inlet end. The tension spring 12 provides tension to facilitate the reset of the damping plate 8. A funnel-shaped water outlet 9 is provided in the middle of the damping plate 8, and a number of through holes 10 are evenly arranged on the outer edge of the damping plate 8; a matching block 11 is also provided on the valve seat near the damping plate 8 inside the pressure reducing valve body 1, which is used to plug and match with the water outlet 9; it can elastically stretch and limit the damping plate 8, and is not prone to continuous vibration and the problem of inability to fix the position. The other end of the tension spring 12 is fixedly connected to the damping plate 8. When the water pressure is large, it will have an impact on the damping plate 8, and the tension spring 12 will elastically stretch. Then the water outlet 9 is plugged and matched with the matching block 11 to complete the resistance effect, which will control the strong water pressure of the water source. By connecting the flanges at both ends of the pressure reducing valve body 1 to the water pipe, the water flow will pass through the damping plate 8 after connection to realize the circulation of the water source, and after circulation, the water source will be discharged through the water outlet 9.

[0027] A first pressure gauge 5 is fixedly connected to one side of the top of the pressure reducing valve body 1, and a second pressure gauge 7 is fixedly connected to the other side of the top of the pressure reducing valve body 1. The first and second pressure gauges 5 and 7 are used to check the water pressure at both ends of the pressure reducing valve body 1. A handwheel 6 is rotatably connected to the middle position of the outer portion of the pressure reducing valve body 1. The handwheel 6 is provided with a rotating rod; one end of the rotating rod is fixed to the handwheel 6, and the other end is provided with a spur gear. A spur rack is provided at the top of the valve stem 14, and the spur gear and spur rack are meshed and connected. The valve stem 14 can be raised and lowered by rotating the handwheel 6.

[0028] Specifically, the working principle of the automatic constant pressure reducing valve in this embodiment is as follows: when in use, first connect the flanges at both ends of the pressure reducing valve body 1 to the water pipe. After the connection, the water flow will realize the circulation of the water source through the damping plate 8. After circulation, the water source will be discharged through the water outlet 9, and the water source will be circulated through the distance between the valve seat 4 and the valve core 2, and discharged through the other end of the pressure reducing valve body 1. The discharged water source controls the flow rate by the distance between the valve seat 4 and the valve core 2, so as to maintain the required discharge pressure; when the water source flows through the pressure reducing valve body 1, the water pressure on the outside of the damping plate 8 is large after the water pressure is controlled, which will impact the damping plate 8, and the tension spring 12 will be elastically stretched, and then the water outlet 9 is plugged into the matching block 11 to complete the resistance effect, which will control the strong water pressure of the water source and reduce the impact damage to the pressure reducing valve body 1, and the water pressure can also be slowed down through the through hole 10.

[0029] The present invention is not limited to the embodiments described above. The above description of the specific embodiments is intended to describe and illustrate the technical solutions of the present invention. The above specific embodiments are merely illustrative and not restrictive. Without departing from the scope of protection of the present invention and the scope of the claims, those skilled in the art may make various specific modifications based on the teachings of the present invention, all of which fall within the scope of protection of the present invention.

Claims

1. An automatic constant pressure reducing valve, comprising: The pressure reducing valve body (1) is characterized in that a valve seat (4) is fixedly connected to the middle position of the inner portion of the pressure reducing valve body (1), a valve core (2) is arranged between the valve seats (4), a fixing rod (13) is fixedly connected to the middle portion of the valve core (2), and a valve stem (14) is connected to the top of the fixing rod (13); a hand wheel (6) is provided at the middle portion of the outer side of the pressure reducing valve body (1), and a rotating rod is provided on the hand wheel (6) and is meshed with a gear of the valve stem (14); the pressure reducing valve body (1) is provided with a plurality of rotating rods, wherein the plurality of rotating rods are ... Both ends of the valve body (1) are fixedly connected with flanges, one end of a tension spring (12) is evenly fixed axially on the inner wall of the flange at the inlet end of the pressure reducing valve body (1), and the other end of the tension spring (12) is connected to a circular damping plate (8), a funnel-shaped water outlet (9) is provided in the middle of the damping plate (8), and a plurality of through holes (10) are evenly provided circumferentially on the damping plate (8); the valve seat (4) is also provided with a matching block (11) for plugging and matching with the water outlet (9).

2. The automatic constant pressure reducing valve according to claim 1, characterized in that: A groove is provided at the top of the fixing rod (13), and a latch block (16) is provided at the bottom of the valve stem (14) so ​​as to fit into the groove. After the latch block (16) is inserted into the groove, a bolt is passed through the fixing rod (13), the groove and the latch block (16) to achieve fastening, and sealing plugs (15) are clamped at both ends of the bolt.

3. The automatic constant pressure reducing valve according to claim 1, characterized in that: The outer side of the valve core (2) is fixedly connected to a sealing wrapping layer (17), and the inner side of the valve seat (4) is fixedly connected to a sealing gasket (3), and the sealing gasket (3) and the sealing wrapping layer (17) can achieve sealing cooperation.

4. The automatic constant pressure reducing valve according to claim 1, characterized in that: A first pressure gauge (5) is fixedly connected to one side of the top end of the pressure reducing valve body (1), and a second pressure gauge (7) is fixedly connected to the other side of the top end of the pressure reducing valve body (1).

5. The automatic constant pressure reducing valve according to claim 1, characterized in that: One end of the rotating rod is fixedly connected to the hand wheel (6), and the other end is provided with a spur gear. The top of the valve stem (14) is provided with a spur rack. The spur gear and the spur rack are meshed and connected. The lifting and lowering control of the valve stem (14) is achieved by rotating the hand wheel (6).

6. The automatic constant pressure reducing valve according to claim 1, characterized in that: The matching block (11) is arranged on one side of the valve seat (4) close to the damping plate (8).

Images