Pressure reducing device capable of adjusting pressure balance

Abstract

The utility model relates to the technical field of pressure reducing devices, in particular to a pressure reducing device capable of adjusting pressure balance. Comprising a valve body, a valve seat, a pressure ball, a connecting plate, a nitrogen spring and the like, the valve seat is installed on the left portion in the valve body, the pressure ball is arranged in the valve body and located on the right side of the valve seat, the pressure ball is embedded into the valve seat, and the left portion of the front side of the valve body is connected with the nitrogen spring used for driving the pressure ball to move. A piston rod of the nitrogen spring is connected with a connecting plate used for limiting the pressure ball, a guide hole used for guiding the connecting plate is formed in the front side of the valve body, and the guide hole is located on the right side of the nitrogen spring. By means of the nitrogen spring and the adjusting assembly, the amount of nitrogen in the nitrogen spring can be conveniently adjusted, so that the pressure of fluid passing through the device is controlled and adjusted by changing the elastic pressure in the nitrogen spring, the operation mode is simple, easy to understand, safe and reliable, and complex operation skills or special tools are not needed.

Description

Technical Field

[0001] The utility model relates to the technical field of pressure reducing devices, in particular to a pressure reducing device with adjustable pressure balance. Background Art

[0002] A pressure reducing device is a device used to reduce and control fluid pressure to ensure that it remains within a stable pressure range required for safety and operation in downstream systems or during use. It is mainly used in multiple fields such as industry, energy, and gas distribution to ensure the reliability and safety of equipment and operations.

[0003] At present, the pressure regulation method of the pressure reducing device is to manually adjust the opening and closing size of the valve to change the throttling area, so as to change the flow rate and the kinetic energy of the fluid, resulting in different pressure losses, thereby adjusting the pressure to achieve the purpose of pressure reduction; however, when the pressure is regulated in the above manner, the opening and closing and the opening and closing size of the pressure reducing device need to be manually controlled each time it is used, which is inconvenient to operate, time-consuming and labor-intensive, and manual regulation depends on the experience of the operator. Once there is an error in the adjustment, the equipment is easily damaged and the regulation effect is poor. Utility Model Content

[0004] In order to overcome the shortcomings that the pressure of the pressure reducing device is currently adjusted manually, the opening and closing of the pressure reducing device and the size of the opening and closing need to be controlled manually each time, which is inconvenient, time-consuming and labor-intensive, and the manual adjustment relies on the experience of the operator. Once there is an error in the adjustment, the equipment is easily damaged and the control effect is poor, the utility model provides a pressure reducing device with adjustable pressure balance.

[0005] The technical solution is: a pressure-reducing device with adjustable pressure balance, including a valve body, a valve seat, a pressure ball, a connecting plate, a nitrogen spring, a seal, a guide assembly and an adjusting assembly. The left side of the valve body is an inlet, and the right side of the valve body is an outlet. A valve seat is installed on the left side of the valve body, and a pressure ball is arranged in the valve body. The pressure ball is located on the right side of the valve seat, and the pressure ball is embedded in the valve seat. A nitrogen spring for driving the pressure ball to move is connected to the left front side of the valve body, and the piston rod of the nitrogen spring is connected to a connecting plate. A guide hole for guiding the connecting plate is opened on the front side of the valve body, and the guide hole is located on the right side of the nitrogen spring. The connecting plate slides through the guide hole, and a seal for sealing the guide hole is provided on the front part of the connecting plate, and the seal is closed with the guide hole. The rear part of the left side of the connecting plate is located on the right side of the pressure ball, and the pressure ball is in contact with the connecting plate. A guide assembly for guiding the connecting plate is provided in the valve body, and an adjusting assembly is provided on the nitrogen spring. The adjusting assembly is used to adjust the pressure of the nitrogen spring.

[0006] More preferably, the guide assembly includes a guide rod and a guide frame, the right side of the valve body is connected to a guide frame for guiding the connecting plate, the guide frame is slidably connected to the guide rod, and the left end of the guide rod is connected to the right side of the connecting plate.

[0007] More preferably, the regulating assembly includes an inlet valve and an outlet valve, an inlet valve is provided on the left front side of the nitrogen spring, and an outlet valve is provided on the right front side of the nitrogen spring, and both the inlet valve and the outlet valve are used to regulate the pressure of the nitrogen spring.

[0008] More preferably, the seal is a sealing plate, and a sealing plate for sealing the guide hole is slidably connected to the front side of the valve body, the sealing plate and the guide hole are closed, the front part of the connecting plate passes through the middle part of the sealing plate, and the connection between the connecting plate and the sealing plate is a sealing arrangement.

[0009] More preferably, a protection frame is further included, the front side of the valve body is connected to the protection frame, the nitrogen spring is located in the protection frame, and the guide hole is located at the rear side of the protection frame.

[0010] More preferably, an air inlet is opened on the left front side of the protection frame, and the air inlet is connected to the air inlet valve; an air outlet is opened on the right front side of the protection frame, and the air outlet is connected to the air outlet valve.

[0011] Beneficial effects of the utility model: the utility model can conveniently adjust the amount of nitrogen inside the nitrogen spring through the nitrogen spring and the adjustment component, so as to control and adjust the pressure of the fluid after passing through the device by changing the internal elastic pressure of the nitrogen spring. This operation method is simple and easy to understand, safe and reliable, and does not require complicated operating skills or special tools. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] Figure 1 It is a three-dimensional structural schematic diagram of the utility model.

[0013] Figure 2 It is a schematic diagram of the cross-sectional three-dimensional structure of the utility model.

[0014] Figure 3 It is a three-dimensional structural schematic diagram of the connecting plate, nitrogen spring, sealing plate and other components of the utility model.

[0015] Figure 4 It is a three-dimensional structural schematic diagram of the valve body, protection frame and other components of the utility model.

[0016] In the above drawings: 1-valve body, 11-valve seat, 2-protective frame, 21-air inlet, 22-air outlet, 3-pressure ball, 4-connecting plate, 41-guide rod, 42-guide frame, 43-guide hole, 5-nitrogen spring, 51-inlet valve, 52-outlet valve, 6-sealing plate. DETAILED DESCRIPTION

[0017] The utility model is further described below in conjunction with the accompanying drawings and embodiments.

[0018] Embodiment: A pressure-reducing device with adjustable pressure balance, such as Figure 1-Figure 3As shown, it includes a valve body 1, a valve seat 11, a pressure ball 3, a connecting plate 4, a nitrogen spring 5, a seal, a guide assembly and an adjusting assembly. The left side of the valve body 1 is an inlet, and the right side of the valve body 1 is an outlet. The valve seat 11 is installed on the left side of the valve body 1, and a pressure ball 3 is arranged in the valve body 1. The pressure ball 3 is located on the right side of the valve seat 11, and the pressure ball 3 is embedded with the valve seat 11. The nitrogen spring 5 is fixedly connected to the left side of the front side of the valve body 1, and the piston rod of the nitrogen spring 5 is fixedly connected to the connecting plate 4. A guide hole 43 is opened on the front side of the valve body 1, and the guide hole 43 is located on the right side of the nitrogen spring 5. The front part of the connecting plate 4 slides through the guide hole 43. A seal is arranged on the front part of the connecting plate 4, and the seal is closed with the guide hole 43. The rear part of the left side of the connecting plate 4 is located on the right side of the pressure ball 3, and the pressure ball 3 contacts the connecting plate 4. A guide assembly is arranged in the valve body 1, and an adjusting assembly is arranged on the nitrogen spring 5.

[0019] like Figure 2 As shown, the guide assembly includes a guide rod 41 and a guide frame 42. The guide frame 42 is fixedly connected to the right side of the valve body 1, the guide rod 41 is slidably connected to the middle of the guide frame 42, and the left end of the guide rod 41 is fixedly connected to the right side of the connecting plate 4.

[0020] like Figure 1 As shown, the regulating assembly includes an inlet valve 51 and an outlet valve 52 . The inlet valve 51 is installed on the left front side of the nitrogen spring 5 , and the outlet valve 52 is installed on the right front side of the nitrogen spring 5 .

[0021] like Figure 1 and Figure 2 As shown, the sealing member is a sealing plate 6, which is slidably connected to the front inner side of the valve body 1, the sealing plate 6 is closed with the guide hole 43, the front part of the connecting plate 4 passes through the middle part of the sealing plate 6, and the connection between the connecting plate 4 and the sealing plate 6 is a sealing setting.

[0022] Initially, the inlet of the valve body 1 is connected with the outlet of the fluid, and the outlet of the valve body 1 is connected with the inlet of the downstream system. The left end of the piston rod of the nitrogen spring 5 and the right side of the inside of the nitrogen spring 5 are filled with nitrogen. The pressure ball 3 is located on the right side of the valve seat 11. The left end of the piston rod of the nitrogen spring 5 is subjected to the elastic pressure of nitrogen and exerts a leftward force on the pressure ball 3 through the connecting plate 4, so that the pressure ball 3 is engaged with the valve seat 11, so that the valve body 1 is in a closed state.

[0023] When in use, the control fluid enters from the inlet of the valve body 1. Since the fluid has a certain flow pressure, it contacts the pressure ball 3, pushes the pressure ball 3 to the right, and makes the pressure ball 3 disengage from the valve seat 11, so that the fluid can flow out from the outlet of the valve body 1 through the valve seat 11. In this process, under the guidance of the guide rod 41 and the guide frame 42, the pressure ball 3 pushes the connecting plate 4 to slide a certain distance to the right along the guide hole 43, and the connecting plate 4 pulls the piston rod of the nitrogen spring 5 to extend a certain length to the right, so that the left end of the piston rod of the nitrogen spring 5 compresses the nitrogen, and the nitrogen The elastic pressure of the gas increases. At the same time, the nitrogen generates a force on the piston rod of the nitrogen spring 5 that is opposite to the force exerted by the fluid on the pressure ball 3, thereby preventing the pressure ball 3 from continuing to move to the right through the piston rod of the nitrogen spring 5 and the connecting plate 4. When the fluid passes through the gap between the pressure ball 3 and the valve seat 11, the pressure is reduced, and the work done by the fluid to drive the pressure ball 3 to move to the right is converted into the elastic potential energy of the nitrogen spring 5 and stored. At the same time, the connecting plate 4 drives the sealing plate 6 to slide to the right, and the sealing plate 6 is always in contact with the guide hole 43 to prevent the fluid from overflowing.

[0024] When the pressure of the fluid flowing downstream needs to be adjusted, for example, to reduce the flow pressure, more nitrogen is charged through the inlet valve 51 to increase the elastic force stored in the nitrogen spring 5, so that under the same fluid pressure, the compression volume required when the nitrogen spring 5 produces the same reaction force on the pressure ball 3 is reduced, that is, when equilibrium is reached, the distance that the fluid drives the pressure ball 3 to move to the right is reduced, the gap between the pressure ball 3 and the valve seat 11 is reduced, and the fluid passing through per unit time is reduced, so that the pressure loss of the fluid is increased, that is, the pressure of the fluid flowing downstream is reduced, thereby achieving further decompression of the fluid; if the flow pressure is to be increased, part of the nitrogen is gradually discharged through the outlet valve 52 to reduce the elastic force stored in the nitrogen spring 5. At this time, the compression volume required when the nitrogen spring 5 produces the same reaction force on the pressure ball 3 is increased, that is, the fluid can drive the pressure ball 3 to move a greater distance to the right, thereby increasing the gap between the pressure ball 3 and the valve seat 11, allowing more fluid to pass, and reducing the pressure loss of the fluid, that is, the fluid pressure flowing to the downstream system is increased, thereby achieving pressurization of the fluid.

[0025] When the fluid pressure gradually decreases to the point where it no longer passes through the valve body 1, the elastic potential energy stored in the nitrogen spring 5 begins to be released, the nitrogen begins to expand and increase in volume, and the left end of the piston rod gradually retracts to the left under the elastic pressure of the nitrogen until it is fully reset, thereby driving the pressure ball 3 to gradually move to the left through the connecting plate 4 until it is fully reset, so that the valve body 1 is closed again.

[0026] By controlling the amount of nitrogen gas charged to control the preloaded spring pressure of the nitrogen spring 5, the fluid can be controlled to push the pressure ball 3 to the right only when its flow pressure is greater than the preloaded spring pressure of the nitrogen spring 5, so that the pressure ball 3 is out of contact with the valve seat 11, and the fluid then flows out from the outlet of the valve body 1 through the valve seat 11, thereby achieving minimum pressure control of the fluid passing through.

[0027] like Figure 1 and Figure 4 As shown, a protective frame 2 is also included, the front side of the valve body 1 is fixedly connected to the protective frame 2, the nitrogen spring 5 is located in the protective frame 2, and the guide hole 43 is located on the rear side of the protective frame 2; an air inlet hole 21 is opened on the left front side of the protective frame 2, and the air inlet hole 21 is connected to the air inlet valve 51, and an air outlet hole 22 is opened on the right front side of the protective frame 2, and the air outlet hole 22 is connected to the air outlet valve 52.

[0028] The provision of the protection frame 2 can further prevent the fluid in the valve body 1 from overflowing through the guide hole 43 and the sealing plate 6, thereby improving safety; and the air inlet hole 21 and the air outlet hole 22 facilitate the inflation and deflation operations of the nitrogen spring 5.

[0029] The above embodiments are provided for persons familiar with the art to implement or use the present invention. Personnel familiar with the art can make various modifications or changes to the above embodiments without departing from the utility model concept of the present invention. Therefore, the protection scope of the present invention is not limited to the above embodiments, but should be the maximum scope of the innovative features mentioned in the claims.

Claims

1. A pressure-reducing device with adjustable pressure balance, comprising a valve body (1), a valve seat (11) and a pressure ball (3), wherein the left side of the valve body (1) is an inlet, and the right side of the valve body (1) is an outlet, the valve seat (11) is installed on the left side of the valve body (1), and a pressure ball (3) is arranged in the valve body (1), the pressure ball (3) is located on the right side of the valve seat (11), and the pressure ball (3) is engaged with the valve seat (11), wherein the characteristics are: The valve body (1) also comprises a connecting plate (4), a nitrogen spring (5), a sealing member, a guide assembly and an adjusting member. The left front part of the valve body (1) is connected with a nitrogen spring (5) for driving the pressure ball (3) to move. The piston rod of the nitrogen spring (5) is connected with the connecting plate (4). The front side of the valve body (1) is provided with a guide hole (43) for guiding the connecting plate (4). The guide hole (43) is located on the right side of the nitrogen spring (5). The connecting plate (4) slides through the guide hole (43). The front part of the connecting plate (4) is provided with a sealing member for sealing the guide hole (43). The sealing member and the guide hole (43) are closed. The left rear part of the connecting plate (4) is located on the right side of the pressure ball (3). The pressure ball (3) and the connecting plate (4) are in contact. The valve body (1) is provided with a guide assembly for guiding the connecting plate (4). The nitrogen spring (5) is provided with an adjusting member. The adjusting member is used to adjust the pressure of the nitrogen spring (5).

2. The adjustable pressure-balanced pressure reducing device according to claim 1, characterized in that: The guide assembly comprises a guide rod (41) and a guide frame (42). The right side of the valve body (1) is connected to the guide frame (42) for guiding the connecting plate (4). The guide rod (41) is slidably connected to the guide frame (42). The left end of the guide rod (41) is connected to the right side of the connecting plate (4).

3. The adjustable pressure-balanced pressure reducing device according to claim 2, characterized in that: The regulating component comprises an inlet valve (51) and an outlet valve (52). The inlet valve (51) is arranged on the left front side of the nitrogen spring (5), and the outlet valve (52) is arranged on the right front side of the nitrogen spring (5). Both the inlet valve (51) and the outlet valve (52) are used to regulate the pressure of the nitrogen spring (5).

4. The adjustable pressure-balanced pressure reducing device according to claim 3, characterized in that: The sealing member is a sealing plate (6), and the sealing plate (6) for sealing the guide hole (43) is slidably connected to the front side of the valve body (1), the sealing plate (6) and the guide hole (43) are closed, the front part of the connecting plate (4) passes through the middle part of the sealing plate (6), and the connection between the connecting plate (4) and the sealing plate (6) is a sealing arrangement.

5. The adjustable pressure-balanced pressure reducing device according to claim 4, characterized in that: It also includes a protection frame (2), the front side of the valve body (1) is connected to the protection frame (2), the nitrogen spring (5) is located in the protection frame (2), and the guide hole (43) is located on the rear side of the protection frame (2).

6. The adjustable pressure-balanced pressure reducing device according to claim 5, characterized in that: An air inlet (21) is provided on the left front side of the protection frame (2), and the air inlet (21) is communicated with the air inlet valve (51). An air outlet (22) is provided on the right front side of the protection frame (2), and the air outlet (22) is communicated with the air outlet valve (52).

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