Novel axial flow type pressure regulating valve

Abstract

According to the novel axial flow type pressure regulating valve, pressure regulating holes in an inner shell are distributed in the inner shell at equal intervals, each pressure regulating hole is provided with a large-diameter part, a transition part and a small-diameter part, and in the moving process of a piston assembly of a pressure regulating mechanism, the head of the piston assembly can sequentially pass through the large-diameter parts, the transition parts and the small-diameter parts. When the head of the piston assembly is located at the large-diameter part, the opening degree of the pressure regulating hole is maximum, the resistance of fluid passing through the pressure regulating hole is minimum, the flow speed is fastest, and the pressure relief valve is suitable for working conditions needing rapid pressure relief. Along with the movement of the piston assembly, the head part gradually enters the transition part, the opening degree of the pressure adjusting hole is gradually reduced, the resistance of fluid passing is gradually increased, and the flow speed is correspondingly reduced, so that the fine adjustment of the fluid pressure is realized. When the head of the piston assembly completely enters the small-diameter part, the opening degree of the pressure adjusting hole is minimum, the resistance of fluid passing through the pressure adjusting hole is maximum, the flow speed is slowest, and the pressure relief valve is suitable for the working condition needing slow pressure relief or stable pressure keeping.

Description

Technical Field

[0001] The utility model relates to the technical field of valves, in particular to a novel axial flow pressure regulating valve. Background Art

[0002] In the prior art, when an axial flow pressure regulating valve is working, it is usually necessary to adjust the flow rate to adapt to different flow requirements. Therefore, there is an urgent need for an axial flow pressure regulating valve that is easy to adjust the flow rate. Summary of the Invention

[0003] In view of this, the utility model provides a novel axial flow pressure regulating valve.

[0004] To achieve the above objectives, the present invention provides the following technical solutions:

[0005] A new type of axial flow pressure regulating valve includes a valve body, a flow channel is formed in the valve body, the flow channel has a liquid inlet and a liquid outlet, a pressure regulating mechanism is arranged in the flow channel, a valve stem is arranged on the valve body, one end of the valve stem extends into the flow channel and is connected to the pressure regulating mechanism, an inner shell is arranged on the side of the flow channel close to the liquid outlet, the inner shell is arranged in a cylindrical structure, a plurality of pressure regulating holes are provided on the inner shell, the aperture of the pressure regulating hole decreases from the side close to the pressure regulating mechanism toward the liquid outlet, and the valve stem drives one end of the pressure regulating mechanism to extend into the inner shell to adjust the opening of the pressure regulating hole.

[0006] Preferably, the pressure regulating hole has a large diameter portion, a transition portion and a small diameter portion, the cross-sectional shapes of the large diameter portion and the small diameter portion are both rectangular, the cross-sectional shape of the transition portion is trapezoidal, and the inner diameter of the large diameter portion is larger than the nominal inner diameter of the transition portion and the inner diameter of the small diameter portion.

[0007] Preferably, the inner diameters of the portions where the transition portion meets the large diameter portion and the small diameter portion on both sides are respectively the same as the inner diameters of the large diameter portion and the small diameter portion.

[0008] Preferably, the pressure regulating mechanism includes a crank-connecting rod assembly and a piston assembly, and the two ends of the crank-connecting rod assembly are respectively connected to one end of the valve stem extending into the flow channel and the piston assembly. Rotating the valve stem drives the piston assembly to move axially in the flow channel through the crank-connecting rod assembly.

[0009] Preferably, the crank-connecting rod assembly includes a crank, a connecting rod, a clamping ring and a fixing seat, the fixing seat is fixedly arranged in the flow channel, a crank mounting groove is provided on the fixing seat, the crank has a transmission end extending into the crank mounting groove and a connecting end connected to the connecting rod, the end of the valve stem extending into the flow channel passes through the groove wall of the crank mounting groove and the transmission end in turn and is connected to the crank, and the end of the connecting rod away from the connecting end is connected to the piston assembly.

[0010] Preferably, the piston assembly includes a coaxially arranged guide rod, a guide sleeve and a piston, the connecting rod of the crank-connecting rod assembly is connected to the guide sleeve, the guide sleeve is arranged on the guide rod, the piston is arranged in a cylindrical structure, a plurality of connecting plates are arranged between the inner wall of the piston and the guide sleeve, and liquid flow holes are arranged between adjacent connecting plates.

[0011] Preferably, a valve seat is provided in the valve body, and a guide support is provided on one end of the valve body close to the liquid outlet. One end of the guide support extends into the valve body and presses the valve seat against the valve seat to press the valve seat tightly into the valve body.

[0012] The beneficial effects of the present invention are as follows: the pressure regulating holes on the inner shell are distributed at equal intervals on the inner shell, and the pressure regulating holes have a large diameter portion, a transition portion, and a small diameter portion. During the movement of the piston assembly of the pressure regulating mechanism, the head of the piston assembly will pass through the large diameter portion, the transition portion, and the small diameter portion in sequence. When the head of the piston assembly is in the large diameter portion, the opening of the pressure regulating hole is the largest. At this time, the resistance of the fluid passing through the pressure regulating hole is the smallest, and the flow rate is the fastest. It is suitable for working conditions that require rapid pressure relief. As the piston assembly moves, the head gradually enters the transition portion, the opening of the pressure regulating hole gradually decreases, the resistance of the fluid passing through gradually increases, and the flow rate slows down accordingly, thereby achieving fine adjustment of the fluid pressure. When the head of the piston assembly completely enters the small diameter portion, the opening of the pressure regulating hole is the smallest. At this time, the resistance of the fluid passing through the pressure regulating hole is the largest, and the flow rate is the slowest. It is suitable for working conditions that require slow pressure relief or maintaining stable pressure. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0014] Attachment Figure 1 This is a schematic diagram of the structure of the utility model;

[0015] Attachment Figure 2 Schematic diagram of the connection between the crank-connecting rod assembly and the piston assembly. DETAILED DESCRIPTION

[0016] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the embodiments described are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0017] The present invention will be further described below with reference to the accompanying drawings.

[0018] The utility model provides the following technical solutions:

[0019] As attached Figure 1-2 As shown, the utility model discloses a novel axial flow pressure regulating valve, comprising a valve body 1, a flow channel 2 is formed in the valve body 1, the flow channel 2 has a liquid inlet 3 and a liquid outlet 4, a pressure regulating mechanism is arranged in the flow channel 2, a valve stem 5 is arranged on the valve body 1, one end of the valve stem 5 extends into the flow channel 2 and is connected with the pressure regulating mechanism, an inner shell 6 is arranged on the side of the flow channel 2 close to the liquid outlet 4, the inner shell 6 is arranged in a cylindrical structure, a plurality of pressure regulating holes 7 are provided on the inner shell 6, the aperture of the pressure regulating hole 7 decreases from the side close to the pressure regulating mechanism toward the liquid outlet 4, and the valve stem 5 drives one end of the pressure regulating mechanism to extend into the inner shell 6 to adjust the opening of the pressure regulating hole 7. Specifically, in this design, the pressure-regulating holes 7 on the inner housing 6 are evenly spaced. The pressure-regulating holes 7 have a large-diameter portion 8, a transition portion 9, and a small-diameter portion 10. During the movement of the piston assembly 12 of the pressure-regulating mechanism, the head of the piston assembly 12 passes through the large-diameter portion 8, the transition portion 9, and the small-diameter portion 10 in sequence. When the head of the piston assembly 12 is in the large-diameter portion 8, the pressure-regulating hole 7 is at its largest opening. At this time, the resistance to the fluid passing through the pressure-regulating hole 7 is minimized, and the flow rate is the fastest, making it suitable for operating conditions requiring rapid pressure relief. As the piston assembly 12 moves, the head gradually enters the transition portion 9, the opening of the pressure-regulating hole 7 gradually decreases, the resistance to the fluid passing through gradually increases, and the flow rate correspondingly slows, thereby achieving fine adjustment of the fluid pressure. When the head of the piston assembly 12 completely enters the small-diameter portion 10, the opening of the pressure-regulating hole 7 is at its smallest opening. At this time, the resistance to the fluid passing through the pressure-regulating hole 7 is maximized, and the flow rate is the slowest, making it suitable for operating conditions requiring slow pressure relief or maintaining stable pressure.

[0020] Furthermore, the pressure regulating hole 7 has a large diameter portion 8, a transition portion 9, and a small diameter portion 10. The cross-sectional shapes of the large diameter portion 8 and the small diameter portion 10 are both rectangular, the cross-sectional shape of the transition portion 9 is trapezoidal, and the inner diameter of the large diameter portion 8 is larger than the nominal inner diameter of the transition portion 9 and the inner diameter of the small diameter portion 10. Specifically, in this embodiment, the pressure regulating hole 7 has different inner diameters at different locations, thereby enabling a gradual pressure change during the pressure regulation process. The larger inner diameter of the large diameter portion 8 ensures that the pressure regulating hole 7 can provide sufficient flow area in the initial stage to accommodate higher flow requirements. The trapezoidal design of the transition portion 9 ensures a smooth transition from the large diameter portion 8 to the small diameter portion 10, avoiding the impact of sudden pressure changes on the system. The smaller inner diameter of the small diameter portion 10 can accurately control the flow of the fluid and achieve fine pressure regulation when the pressure regulating hole 7 is close to being completely closed.

[0021] Further, the inner diameters of the transition portion 9 at both sides where it connects with the large diameter portion 8 and the small diameter portion 10 are the same as the inner diameters of the large diameter portion 8 and the small diameter portion 10 respectively. Specifically, in this embodiment, the length of the transition portion 9 is designed to be moderate to ensure the smoothness of pressure change during pressure regulation. The inner diameter of the transition portion 9 gradually decreases from the inner diameter of the large diameter portion 8 to the inner diameter of the small diameter portion 10, forming a gradual transition area. This design not only ensures the smoothness of fluid passing through the pressure regulating hole 7, but also effectively avoids the system vibration or noise that may be caused by sudden pressure change. In addition, the trapezoidal cross-sectional shape of the transition portion 9 helps to disperse the pressure generated when the fluid passes through, further reducing the impact on the system. In practical applications, this gradual pressure regulating design can improve the stability and reliability of the system, ensuring the performance of the equipment in long-term operation.

[0022] Further, the pressure regulating mechanism includes a crank linkage assembly 11 and a piston assembly 12, both ends of the crank linkage assembly 11 are connected with one end of the valve stem 5 extending into the flow passage 2 and the piston assembly 12 respectively, rotating the valve stem 5 drives the piston assembly 12 to move axially in the flow passage 2 through the crank linkage assembly 11. Specifically, in this embodiment, the crank linkage 14 in the pressure regulating mechanism can convert the rotation of the valve stem 5 into the axial movement of the piston in the flow passage 2, thereby realizing precise control of fluid flow.

[0023] Further, the crank connecting rod assembly 11 includes a crank 13, a connecting rod 14, a collar 15, and a fixed seat 16. The fixed seat 16 is fixedly arranged in the flow channel 2, and a crank mounting groove 17 is formed in the fixed seat 16. The crank 13 has a transmission end 25 extending into the crank mounting groove 17 and a connecting end 18 connected to the connecting rod 14. The valve rod 5 is connected to the crank 13 through the groove wall of the crank mounting groove 17 and the transmission end. The connecting rod 14 is connected to the piston assembly 12 at an end away from the connecting end 18. Specifically, in this embodiment, the fine design of the crank connecting rod assembly 11 further improves the smoothness and efficiency of valve operation. The crank 13, as the core component of power transmission, has a durable material that ensures stability during long-term operation. The connecting rod 14 connects the crank 13 and the piston assembly 12, converting rotary motion into linear motion and achieving efficient energy conversion. The collar 15 not only enhances the connection strength between the connecting rod 14 and the crank 13, but also prevents loosening caused by vibration or impact, ensuring the tight fit of the entire assembly. The fixed seat 16, as the base of the crank connecting rod assembly 11, provides a solid support for the entire assembly with precise positioning and firm installation. The clever design of the crank mounting groove 17 allows the crank 13 to be accurately installed in place and precisely connected to the valve rod 5. The valve rod 5, as a key component connecting external operating mechanisms and internal adjusting mechanisms, is connected to the crank 13 through the groove wall of the crank mounting groove 17 and the transmission end, enabling synchronous operation of external operation and internal adjustment. In addition, the precise connection between the connecting rod 14 and the piston assembly 12 at an end away from the connecting end 18 directly transmits power to the valve's execution component, achieving precise control over fluid flow.

[0024] Further, the piston assembly 12 includes a guide rod 19, a guide sleeve 20, and a piston 21 arranged coaxially. The connecting rod 14 of the crank connecting rod assembly 11 is connected to the guide sleeve 20, which is sleeved on the guide rod 19. The piston 21 is arranged in a cylindrical structure. A plurality of connecting plates 22 are arranged between the inner wall of the piston 21 and the guide sleeve 20. Liquid flow holes are arranged between adjacent connecting plates 22.

[0025] Further, a valve seat 23 is arranged in the valve body 1. A guide support 24 is arranged on one end of the valve body 1 near the liquid outlet 4. One end of the guide support 24 extends into the valve body 1 and presses against the valve seat 23, pressing the valve seat 23 tightly in the valve body 1. Specifically, in this embodiment, the guide support 24 is a cylindrical structure with a groove at one end. The groove part cooperates with the outer edge of the valve seat 23 to ensure the stable positioning of the valve seat 23 in the valve body 1. The other end of the guide support 24 is tightly fitted with the inner wall of the valve body 1 and is fixed by screw connection or welding, thereby ensuring the stability of the valve seat 23 while facilitating maintenance and replacement in the later stage.

[0026] The above description of the disclosed embodiments will enable one skilled in the art to implement or use the present invention. Various modifications to these embodiments will be readily apparent to one skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the present invention. Therefore, the present invention is not limited to the embodiments shown herein but is intended to conform to the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A novel axial flow pressure regulating valve, comprising a valve body, a flow channel formed therein, the flow channel having a liquid inlet and a liquid outlet, a pressure regulating mechanism disposed in the flow channel, and a valve stem disposed on the valve body, one end of the valve stem extending into the flow channel and connected to the pressure regulating mechanism, characterized in that: An inner shell is provided on the side of the flow channel close to the liquid outlet. The inner shell is provided with a cylindrical structure. A plurality of pressure regulating holes are provided on the inner shell. The aperture of the pressure regulating holes decreases from the side close to the pressure regulating mechanism toward the liquid outlet. The valve stem drives one end of the pressure regulating mechanism to extend into the inner shell to adjust the opening of the pressure regulating holes.

2. The novel axial flow pressure regulating valve according to claim 1 is characterized in that: The pressure regulating hole has a large diameter portion, a transition portion and a small diameter portion. The cross-sectional shapes of the large diameter portion and the small diameter portion are both rectangular, the cross-sectional shape of the transition portion is trapezoidal, and the inner diameter of the large diameter portion is larger than the nominal inner diameter of the transition portion and the inner diameter of the small diameter portion.

3. The new axial flow pressure regulating valve according to claim 2 is characterized in that: The inner diameters of the portions where both sides of the transition portion meet the large diameter portion and the small diameter portion are respectively the same as the inner diameters of the large diameter portion and the small diameter portion.

4. The novel axial flow pressure regulating valve according to claim 1 is characterized in that: The pressure regulating mechanism includes a crank-connecting rod assembly and a piston assembly. The two ends of the crank-connecting rod assembly are respectively connected to one end of the valve stem extending into the flow channel and the piston assembly. Rotating the valve stem drives the piston assembly to move axially in the flow channel through the crank-connecting rod assembly.

5. The novel axial flow pressure regulating valve according to claim 4 is characterized in that: The crank-connecting rod assembly includes a crank, a connecting rod, a clamping ring and a fixing seat. The fixing seat is fixedly arranged in the flow channel. A crank mounting groove is provided on the fixing seat. The crank has a transmission end extending into the crank mounting groove and a connecting end connected to the connecting rod. One end of the valve stem extending into the flow channel passes through the groove wall of the crank mounting groove and the transmission end in sequence and is connected to the crank. The end of the connecting rod away from the connecting end is connected to the piston assembly.

6. The novel axial flow pressure regulating valve according to claim 5 is characterized in that: The piston assembly includes a coaxially arranged guide rod, a guide sleeve and a piston. The connecting rod of the crank-connecting rod assembly is connected to the guide sleeve. The guide sleeve is mounted on the guide rod. The piston is arranged in a cylindrical structure. Several connecting plates are arranged between the inner wall of the piston and the guide sleeve. Liquid flow holes are arranged between adjacent connecting plates.

7. The novel axial flow pressure regulating valve according to claim 1 is characterized in that: A valve seat is provided in the valve body, and a guide support is provided on one end of the valve body close to the liquid outlet. One end of the guide support extends into the valve body and presses the valve seat against the valve seat to press the valve seat tightly into the valve body.

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