High-efficiency pneumatic control valve special for nitrogen conveying

Abstract

The utility model discloses a special pneumatic regulating valve for high-efficiency nitrogen delivery, which relates to the field of regulating valves and comprises a regulating valve body, a support, a valve positioner and a starting actuating mechanism, the support is fixedly mounted at the top of the regulating valve body, and the starting actuating mechanism is fixedly mounted at the top of the support. The valve positioner is fixedly installed on the outer side of the support, the valve rod is movably installed in the adjusting valve body and the starting executing mechanism, and the protection assembly is movably installed on the outer side of the support. The sealing ring is clamped and attached to the inner side of the groove, the first protective cover and the second protective cover are clamped from the front side and the rear side of the support, the inserting rod penetrates through the through hole to be located in front of the support, and the first protective cover and the second protective cover are clamped and fixed to the outer portion of the support by screwing the fixing nut to the outer portion of the inserting rod. Therefore, the inner side part of the support is sealed, and dust and impurity contamination is avoided, internal pollution is avoided, and use is not affected.

Description

TECHNICAL FIELD

[0001] The utility model relates to the field of governing valve, concretely relates to a high -efficient nitrogen gas conveying special pneumatic governing valve. BACKGROUND

[0002] Nitrogen is a colorless, odorless, odorless gas, nitrogen has very high chemical stability at normal temperature and pressure, and is not easy to react with other substances, so it is often used as a protective gas, nitrogen is often used in industrial, biological and other fields production, pneumatic governing valve is with compressed gas as power source, with cylinder as actuator, and by means of valve positioner, converter, solenoid valve, position valve, gas tank, gas filter and other accessories to drive valve, realize on-off or proportional governing, receive the control signal of industrial automation control system to complete the adjustment of pipeline medium: flow, pressure, temperature, liquid level and various process parameters. The characteristic of pneumatic governing valve is simple control, fast response, and intrinsic safety, without additional explosion-proof measures.

[0003] The existing pneumatic governing valve is not provided with a protective shell outside, the part of the valve rod in the support is exposed, which can easily cause external dust and impurities to fall into the inside, cause internal pollution, affect use, and the valve rod and the valve seat are usually sealed by a sealing ring, which can easily wear out after long-term use, cause the sealing effect to decrease, and is not convenient for quick disassembly and maintenance. UTILITY MODEL CONTENT

[0004] To solve the above technical problems, the technical scheme adopted by the utility model is:

[0005] A high-efficiency nitrogen gas conveying special pneumatic governing valve, comprising a governing valve body, a support, a valve positioner and a starting execution mechanism, the support is fixedly installed on the top of the governing valve body, the starting execution mechanism is fixedly installed on the top of the support, the valve positioner is fixedly installed on the outer side of the support, the inside of the governing valve body and the starting execution mechanism is movably installed on the valve rod, the outer side of the support is movably installed with a protection assembly, the bottom of the valve rod is movably installed with a valve core located in the governing valve body, the protection assembly comprises a protection cover one and a protection cover two, recesses and through holes located on the outer side of the recesses are formed on the front and rear sides of the support, the protection cover one is movably clamped on the front side of the support, the protection cover two is fixedly clamped on the rear side of the support, the inner side of the protection cover two is fixedly connected with a plug rod located in the through hole, the outer side of the plug rod is movably installed with a fixed nut located outside the protection cover one.

[0006] The further improvement in the technical scheme of the utility model lies in that: the adjusting valve body comprises a valve body, the bottom of the valve body is fixedly connected with a butt flange plate, the bottom of the protection cover one is movably clamped with a sealing flange plate, the valve core comprises a core body and a sealing sleeve fixedly clamped outside the core body, the bottom of the valve rod is provided with a fixing hole, and the bottom of the core body is movably installed with a fixing bolt located in the fixing hole.

[0007] The further improvement in the technical scheme of the utility model lies in that: the inside of the groove is movably clamped with a sealing ring, and the sealing ring is attached to the inner walls of the protection cover one and the protection cover two.

[0008] The further improvement in the technical scheme of the utility model lies in that: the protection cover one and the protection cover two are made of transparent material.

[0009] The further improvement in the technical scheme of the utility model lies in that: the bottom of the sealing flange plate is movably installed with a fastening bolt located in the butt flange plate.

[0010] The further improvement in the technical scheme of the utility model lies in that: the pneumatic inlet of the starting execution mechanism is located below.

[0011] The further improvement in the technical scheme of the utility model lies in that: the core body is conically arranged, and the sealing sleeve is made of rubber material.

[0012] Due to the adoption of the above technical scheme, the utility model has the following technical progress compared with the prior art:

[0013] 1. The utility model provides a kind of high efficiency nitrogen gas conveying special pneumatic regulating valve, and sealing ring is clamped and attached to the inside of groove, and by the protection cover one and protection cover two are clamped from the front and rear sides of support, make plug rod pass through through-hole and be located in the front of support, use fixed nut and be screwed on plug rod outside to clamp and fix the protection cover one and protection cover two in the outside of support, to seal part in the inside of support, avoid dust impurity contamination, cause internal pollution, affect use.

[0014] 2. The utility model provides a kind of high efficiency nitrogen gas conveying special pneumatic regulating valve, when sealing sleeve produces greater wear, by removing fastening bolt and removing sealing flange plate from the bottom of butt flange plate, then by rotating fixing bolt and removing it from the inside of fixing hole, so that the core body can be disassembled and removed from butt flange plate, to facilitate the replacement of sealing sleeve, improve the convenience of maintenance. BRIEF DESCRIPTION OF DRAWINGS

[0015] Figure 1 It is the structure diagram of the utility model's high efficiency nitrogen gas conveying special pneumatic regulating valve;

[0016] Figure 2The utility model discloses a valve body's structure schematic drawing;

[0017] Figure 3 The utility model discloses a cross section structure schematic drawing;

[0018] Figure 4 The utility model discloses a protective assembly's structure schematic drawing;

[0019] Figure 5 The utility model discloses a regulating valve main body's structure schematic drawing.

[0020] In the drawing: 1, regulating valve main body;11, valve body;12, butt flange plate;13, sealing flange plate;14, fastening bolt;2, support;21, recess;22, through -hole;3, valve positioner;4, starting execution mechanism;5, valve stem;6, protective assembly;61, sealing ring;62, protective cover one;63, protective cover two;64, plug rod;65, fixed nut;7, valve core;71, core body;72, sealing sleeve;73, fixed hole;74, fixed bolt. Specific implementation

[0021] The utility model makes further detailed explanation below:

[0022] As Figures 1 to 5 The utility model provides a high -efficient nitrogen gas conveying special pneumatic regulating valve, including regulating valve main body 1, support 2, valve positioner 3 and starting execution mechanism 4, support 2 fixed mounting is at the top of regulating valve main body 1, and starting execution mechanism 4 fixed mounting is at the top of support 2, and valve positioner 3 fixed mounting is at the outside of support 2, and regulating valve main body 1 and the inside activity of starting execution mechanism 4 install in valve stem 5, and the outside activity of support 2 installs protective assembly 6, and the bottom activity of valve stem 5 installs valve core 7 in regulating valve main body 1, and protective assembly 6 includes protective cover one 62 and protective cover two 63, and the front and rear sides of support 2 are all set with recess 21 and the through -hole 22 located at the recess 21 outside, and protective cover one 62 activity joint is at the front side of support 2, and protective cover two 63 fixed joint is at the rear side of support 2, and the inside fixed connection of protective cover two 63 has plug rod 64 in the through -hole 22, and the outside activity of plug rod 64 installs fixed nut 65 outside protective cover one 62.

[0023] Through sealing ring 61 card set and adhere to the inside of recess 21, and by the front and rear sides of protective cover one 62 and protective cover two 63 from support 2 and clamping, make plug rod 64 pass through through -hole 22 and be located in the front of support 2, and use fixed nut 65 and screw on plug rod 64 outside and press protective cover one 62 and protective cover two 63 and clamp and fix in support 2 outside, to seal the part of the inside of support 2, avoid dust impurity and contaminate, cause internal pollution, influence use.

[0024] AsFigure 5 As shown, the adjusting valve body 1 includes a valve body 11, the bottom of the valve body 11 is fixedly connected with a butt flange plate 12, the bottom of the protective cover one 62 is movably connected with a sealing flange plate 13, the valve core 7 includes a core body 71 and a sealing sleeve 72 fixedly connected outside the core body 71, the bottom of the valve rod 5 is provided with a fixed hole 73, the bottom of the core body 71 is movably installed with a fixing bolt 74 located in the fixed hole 73.

[0025] When the sealing sleeve 72 is worn out, the sealing flange plate 13 is disassembled from the bottom of the butt flange plate 12 by disassembling the fastening bolt 14, and then the sealing flange plate 13 is disassembled from the inside of the fixed hole 73 by rotating the fixing bolt 74, so that the core body 71 can be disassembled and taken out from the butt flange plate 12, thereby facilitating the replacement of the sealing sleeve 72, and improving the convenience of maintenance.

[0026] As shown in Figure 4 The recess 21 is movably connected with a sealing ring 61, and the sealing ring 61 is attached to the inner walls of the protective cover one 62 and the protective cover two 63.

[0027] The sealing ring 61 installed in the recess 21 is attached to the inner walls of the protective cover one 62 and the protective cover two 63, thereby improving the sealing of the connection.

[0028] As shown in Figure 4 The protective cover one 62 and the protective cover two 63 are made of transparent material.

[0029] The protective cover one 62 and the protective cover two 63 are made of transparent material, which facilitates the viewing of the travel pointer inside the bracket 2.

[0030] As shown in Figure 5 The bottom of the sealing flange plate 13 is movably installed with a fastening bolt 14 located in the butt flange plate 12.

[0031] The fastening bolt 14 penetrates the sealing flange plate 13 from the bottom of the sealing flange plate 13 and is installed in the inside of the butt flange plate 12, thereby ensuring the tightness of the connection between the sealing flange plate 13 and the butt flange plate 12.

[0032] As shown in Figure 2 The gas inlet of the starting actuator 4 is located below.

[0033] The starting inlet is located below the starting actuator 4, thereby increasing the air pressure in the membrane chamber lower cavity inside the starting actuator 4 to push the thin film to deform and drive the valve core 7 at the bottom of the valve rod 5 to move upward and be clamped in the valve body 11 to seal, and vice versa.

[0034] As shown in Figure 5 The core body 71 is conical, and the sealing sleeve 72 is made of rubber.

[0035] The conical core 71, narrower at the top and wider at the bottom, moves upward with the valve stem 5 and engages with the sealing sleeve 72 to lock into the valve body 11 for sealing.

[0036] The working principle of this high-efficiency nitrogen delivery pneumatic regulating valve will be explained in detail below.

[0037] like Figures 1 to 5 As shown, during use, air is introduced into the starting actuator 4 from the bottom, generating a pressure difference that causes the diaphragm inside the starting actuator 4 to bend and deform, thereby moving the valve core 7 at the bottom of the valve stem 5. The valve core 7 moves upward due to the deformation of the diaphragm and presses against the opening position inside the valve body 11, sealing it with the sealing sleeve 72. Conversely, the control causes the valve core 7 to move downward, opening the regulating valve body 1. The sealing ring 61 is fitted and adheres to the inner side of the groove 21. By engaging the first protective cover 62 and the second protective cover 63 from the front and rear sides of the bracket 2, the insertion rod 64 passes through the through hole 22 and is positioned in front of the bracket 2, thus securing it in place. The nut 65 is screwed onto the outside of the insert rod 64 to clamp and fix the first protective cover 62 and the second protective cover 63 to the outside of the bracket 2, thereby sealing the inside of the bracket 2 to prevent dust and impurities from contaminating the inside and affecting its use. After long-term use, the sealing sleeve 72 will experience significant wear. By removing the fastening bolt 14, the sealing flange 13 can be removed from the bottom of the mating flange 12. Then, by rotating the fixing bolt 74, it can be removed from the inside of the fixing hole 73, thereby allowing the core 71 to be disassembled and removed from the mating flange 12. This facilitates the replacement of the sealing sleeve 72 and improves the convenience of maintenance.

[0038] The present invention has been described in detail above. However, modifications or improvements can be made to it, which will be obvious to those skilled in the art. Therefore, any modifications or improvements that do not depart from the spirit of the present invention are within the protection scope of the present invention.

Claims

1. A high-efficiency pneumatic regulating valve for nitrogen gas transmission, comprising a regulating valve body (1), a bracket (2), a valve positioner (3) and a starting actuator (4), characterized in that: The bracket (2) is fixedly installed on the top of the regulating valve body (1), the starting execution mechanism (4) is fixedly installed on the top of the bracket (2), the valve positioner (3) is fixedly installed on the outer side of the bracket (2), the inside of the regulating valve body (1) and the starting execution mechanism (4) is movably installed on the valve rod (5), the outer side of the bracket (2) movably installs the protection assembly (6), the bottom of the valve rod (5) movably installs the valve core (7) in the regulating valve body (1). The protection assembly (6) includes protection cover one (62) and protection cover two (63), the front and rear sides of the bracket (2) are provided with recesses (21) and through holes (22) on the outer side of the recesses (21), the protection cover one (62) is movably connected to the front side of the bracket (2), the protection cover two (63) is fixedly connected to the rear side of the bracket (2), the inner side of the protection cover two (63) is fixedly connected with the insertion rod (64) in the through hole (22), the outer side of the insertion rod (64) movably installs the fixed nut (65) outside the protection cover one (62).

2. The high performance pneumatic control valve for nitrogen gas delivery according to claim 1, wherein: The regulating valve body (1) includes a valve body (11), the bottom of the valve body (11) is fixedly connected with a butt flange plate (12), the bottom of the protection cover one (62) movably connects a sealing flange plate (13), the valve core (7) includes a core body (71) and a sealing sleeve (72) fixedly connected to the outer side of the core body (71), the bottom of the valve rod (5) is provided with a fixed hole (73), the bottom of the core body (71) movably installs a fixed bolt (74) in the fixed hole (73).

3. The high performance pneumatic control valve for nitrogen gas delivery according to claim 1, wherein: The inside of the recess (21) movably connects a sealing ring (61), the sealing ring (61) is attached to the inner wall of the protection cover one (62) and the protection cover two (63).

4. The high performance pneumatic control valve for nitrogen gas delivery according to claim 1, wherein: The protection cover one (62) and the protection cover two (63) are transparent materials.

5. The high performance pneumatic control valve for nitrogen gas delivery according to claim 2, wherein: The bottom of the sealing flange plate (13) movably installs a fastening bolt (14) in the butt flange plate (12).

6. The high performance pneumatic control valve for nitrogen gas delivery according to claim 2, wherein: The pneumatic inlet of the starting execution mechanism (4) is located below.

7. The high performance pneumatic control valve for nitrogen gas delivery according to claim 2, wherein: The core body (71) is conical, and the sealing sleeve (72) is made of rubber.

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