Pneumatic thin film stand column type single-seat adjusting valve

Abstract

The utility model belongs to the technical field of pneumatic control valves, and discloses a pneumatic film column type single-seat control valve which comprises a valve body, the upper end of the valve body is connected with a valve cover component, and a valve seat is arranged in the valve body. The valve seat is connected with a valve element assembly in a matched mode, the valve element assembly is connected with a valve rod through an inner screw, the valve rod penetrates through the valve deck component to be connected with an executing mechanism at the top end, and the lower end of the executing mechanism is connected with a stand column. A filler is arranged in the valve cover part, and a filler gland is arranged at the upper end of the filler; a connecting shaft is arranged at the upper end of the packing gland, a connecting block is arranged at the upper end of the connecting shaft, and a corrugated pipe protection sleeve is arranged at the upper end of the connecting block. The utility model has the characteristics of high support strength, good dustproof effect, strong pressure regulation stability, good large flow and high pressure difference impact resistance and the like, has good applicability to the environment with heavy dust, and can be widely applied to the production technical fields of chemical industry, biology, petroleum, metallurgy and the like.

Description

TECHNICAL FIELD

[0001] The utility model belongs to pneumatic single seat regulating valve technical field, concretely relates to a kind of pneumatic diaphragm stand column type single seat regulating valve. BACKGROUND

[0002] Pneumatic diaphragm single seat regulating valve is a kind of common industrial automation control valve, it is driven valve core movement by pneumatic actuator, realizes accurate control to fluid.Pneumatic diaphragm single seat regulating valve is widely used in chemical industry, petroleum, electric power, steam and various industrial occasions due to having the characteristics such as simple structure, high regulating accuracy, fast response speed, good sealing.

[0003] At present, there are many literature introductions about pneumatic diaphragm single seat regulating valve.For example, patent application number "202220905615.9" introduces a kind of high-performance pneumatic diaphragm single seat regulating valve, by first fixed screw fixed installation pneumatic diaphragm actuator makes its inside tight type strong, while mounting plate and support rod can play better support stability, reach the effect of enhancing structural strength, with the efficacy of stable installation and performance improvement.For example, patent application number "202122649173.4" introduces a kind of pneumatic diaphragm cage type single seat regulating valve, by being provided with valve cage in valve body, liquid flow hole is arranged on the side surface of valve cage, connecting rod and valve rod are connected by the protrusion on connecting rod and valve rod and the clamping connection block inside the clamping recess, so that the connecting strength between connecting rod and valve rod is guaranteed, sliding of valve rod is avoided, and adjustment accuracy is guaranteed.However, the existing pneumatic diaphragm single seat regulating valve is easy to enter dust inside in the environment with much dust, and valve rod wear is easy to appear after a period of use, so that flow control is not accurate enough, and existing valve core is easy to be damaged by impact under the condition of instantaneous large flow and high pressure difference, which affects the service life of regulating valve. UTILITY MODEL CONTENTS

[0004] The utility model aims at overcoming the deficiencies in the prior art, providing a kind of pneumatic diaphragm stand column type single seat regulating valve, with high support strength, good dustproof effect, strong regulating pressure stability and good anti-large flow and high pressure difference impact effect etc.Characteristics, for the environment with much dust has good applicability, can be widely used in chemical industry, biology, petroleum, metallurgy and other production technology fields.

[0005] In order to achieve the above object, the utility model adopts the following technical scheme: a pneumatic diaphragm stand column type single seat regulating valve, including valve body, the valve body upper end connects valve cover part, inside is equipped with valve seat, the valve seat is connected with valve core assembly cooperation, the valve core assembly is connected with valve stem through inner screw, the valve stem passes through the valve cover part and connects the top end of actuating mechanism, the actuating mechanism lower extreme connects stand column, the valve cover part inside is equipped with packing, the packing upper end is equipped with packing gland, the packing gland upper end is equipped with connecting shaft, the connecting shaft upper end is equipped with connecting block, the connecting block upper end is equipped with bellows protection sleeve.

[0006] As an improvement, the valve body is provided with an S streamline fluid channel, and the medium inlet and outlet are provided with flange structures at both ends.

[0007] As an improvement, the valve cover part is stably connected with the valve body through bolts.

[0008] As an improvement, the valve core assembly includes a thickened shaft, and the thickened shaft is connected with a sealing valve core at the bottom through welding.

[0009] As an improvement, the actuating mechanism is provided with a fixed disc inside, a plurality of compression springs are arranged on the fixed disc, and an elastic adjusting piece is arranged below the fixed disc.

[0010] As an improvement, the actuating mechanism includes upper and lower diaphragms, and the upper and lower diaphragms are fixedly connected through a plurality of bolt assemblies; the upper diaphragm of the actuating mechanism is provided with an adjusting screw, and the lower diaphragm is provided with a pressure tapping pipe interface.

[0011] As an improvement, the actuating mechanism is provided with an upper support plate at the lower end, and the stand column is connected through the upper support plate.

[0012] As an improvement, the stand column is provided with a lower support plate at the lower end, and the valve cover part is connected through the lower support plate, and a union is arranged on the lower support plate.

[0013] As an improvement, the stand column is provided with four columns, and a scale card is arranged on the stand column, and the scale card is fixed on the stand column through a hoop.

[0014] As an improvement, the connecting block is a detachable symmetrical connecting structure, and the upper and lower structures are fixedly connected through inner hexagonal bolts.

[0015] As an improvement, the bellows protection sleeve is a telescopic plastic sheath, which is sleeved on the periphery of the exposed valve stem.

[0016] The pneumatic diaphragm stand column type single seat regulating valve has the characteristics of high supporting strength, good dustproof effect, strong pressure regulating stability, good resistance to large flow and high pressure difference impact effect and the like. BRIEF DESCRIPTION OF DRAWINGS

[0017] Figure 1 is a structural schematic view of the pneumatic diaphragm stand column type single seat regulating valve.

[0018] In the figure: 1, valve body, 2, valve cover part, 3, valve seat, 4, valve core assembly, 41, thickened shaft, 42, sealing valve core, 5, internal screw, 6, valve stem, 7, actuator, 8, stand column, 9, packing, 10, packing gland, 11, connecting shaft, 12, connecting block, 13, corrugated tube protective sleeve; 14, bolt; 15, fixed disc; 16, compression spring, 17, elastic adjusting piece, 18, pressure tapping pipe interface, 19, upper support plate, 20, lower support plate, 21, cap, 22, scale card, 23, adjusting screw, 24, bolt assembly. DETAILED DESCRIPTION

[0019] The preferred embodiment of the utility model will be described in detail in combination with the drawings.

[0020] As Figure 1 shown, the pneumatic diaphragm stand column type single seat regulating valve of the embodiment comprises a valve body 1, the valve body 1 is connected with a valve cover part 2 at the upper end, and is internally provided with a valve seat 3; the valve seat 3 is connected with a valve core assembly 4 in a matched mode, the valve core assembly 4 is connected with a valve stem 6 through an internal screw 5, the valve stem 6 penetrates through the valve cover part 2 and is connected with an actuator 7 at the top end, and the actuator 7 is connected with a stand column 8 at the lower end; the valve cover part 2 is internally provided with a packing 9, and the packing 9 is provided with a packing gland 10 at the upper end; the packing gland 10 is provided with a connecting shaft 11 at the upper end, the connecting shaft 11 is provided with a connecting block 12 at the upper end, and the connecting block 12 is provided with a corrugated tube protective sleeve 13 at the upper end.

[0021] Further, the valve body 1 is provided with S streamline fluid channel, and the both ends are provided with flange structure medium inlet and outlet; specifically, the valve body 1 is cast carbon steel material, and the left side is medium inlet, and the right side is medium outlet; more specifically, the valve body 1 and the valve seat 3 are provided with valve seat sealing pad, the valve seat sealing pad is high pressure resistant paper board material, and the thickness is 1-2mm.

[0022] Further, the valve cover component 2 is stably connected with the valve body 1 through the bolt 14; specifically, the bolt 14 is double head stud structure, and there are 6-10, and the size is M10-M20mm, so that the valve cover component 2 and the valve body 1 are reliably and stably connected.

[0023] Further, the valve core assembly 4 includes a thickened shaft 41, and the thickened shaft is connected with the sealing valve core 42 at the bottom through welding; specifically, the sealing valve core 42 is connected with the valve seat 3 through the inclined surface, so that the opening and closing of the regulating valve are realized.

[0024] Further, the fixed disc 15 is arranged in the actuator 7, a plurality of compression springs 16 are arranged on the fixed disc 15, preferably three groups, and the elastic adjusting piece 17 is arranged below the fixed disc 15; through the plurality of compression springs 16, the pressure regulation stability is better, and the pressure regulation is more accurate; specifically, the actuator 7 includes upper and lower diaphragms, and the upper and lower diaphragms are fixedly connected through a plurality of bolt assemblies 24; specifically, the bolt assemblies 24 are 10-20 sets; the upper diaphragm of the actuator 7 is provided with an adjusting screw 23, and the lower diaphragm is provided with a pressure taking pipe interface 18; the adjusting screw 23 is used for adjusting the compression spring 16, so as to complete the up and down displacement of the valve rod 6, and realize pressure regulation; and the pressure taking pipe interface 18 is used for conveniently connecting the pressure taking pipeline, so as to realize pressure monitoring.

[0025] Further, the upper support plate 19 is arranged at the lower end of the actuator 7, and the vertical column 8 is connected through the upper support plate 19; specifically, the upper support plate 19 is internally provided with a circular hole, and the vertical column 8 passes through the circular hole and is fixedly connected with the actuator 7 through a long bolt and a nut.

[0026] Further, the lower support plate 20 is arranged at the lower end of the vertical column 8, and the vertical column 8 is connected with the valve cover component 2 through the lower support plate 20; the lower support plate 20 is provided with a nut 21; specifically, the vertical column 8 is four, and the scale card 22 is arranged on the vertical column 8; the scale card 22 is fixed on the vertical column 8 through a hoop.

[0027] Further, the connecting block 12 is detachable upper and lower symmetrical connection structure, fixed connection upper and lower two blocks of structure through the inner hexagonal bolt; Specifically, the valve stem 6 is divided into upper and lower two parts through the connecting block 12, so as to facilitate the installation and fixation of the bellows protective sleeve 13; More specifically, the bellows protective sleeve 13 is a telescopic plastic sheath, which is sleeved on the outer periphery of the exposed valve stem, thereby effectively preventing dust from entering the valve stem from each connecting part, avoiding dust accelerating the wear and failure of the valve stem, thereby improving the service life of the regulating valve in the dust environment.

[0028] The pneumatic thin film stand column type single seat regulating valve has the characteristics of high supporting strength, good dustproof effect, strong regulating pressure stability, good resistance to large flow and high pressure difference impact effect and the like, adopts the bellows protective sleeve structure to prevent dust from entering the regulating valve, and thickens the valve core connecting rod to improve the impact resistance of the valve core to large flow and high pressure difference, and can be widely applied to the production technical fields of chemical industry, biology, petroleum, metallurgy and the like.

[0029] Finally, it should be noted that the above enumeration is only a specific embodiment of the present application. Obviously, the present application is not limited to the above embodiments, and there can be many variations. All variations that can be directly derived or inferred from the disclosed content by those skilled in the art should be considered as falling within the protection scope of the present application.

Claims

1. A pneumatic diaphragm stand column single seat regulating valve, comprising a valve body (1), the upper end of the valve body (1) is connected with a valve cover part (2), and a valve seat (3) is arranged in the valve body (1); characterized in that, The valve seat (3) is connected with the valve core assembly (4), the valve core assembly (4) is connected with the valve stem (6) through the inner screw (5), the valve stem (6) is connected with the actuator (7) at the top end through the valve cover component (2), the lower end of the actuator (7) is connected with the stand column (8); The valve cover component (2) is provided with a packing (9) inside, the upper end of the packing (9) is provided with a packing gland (10); The upper end of the packing gland (10) is provided with a connecting shaft (11), the upper end of the connecting shaft (11) is provided with a connecting block (12), the upper end of the connecting block (12) is provided with a bellows protection sleeve (13).

2. The aerodynamic diaphragm stand valve according to claim 1, wherein The valve body (1) is provided with S streamline fluid channel, and the medium inlet and outlet are provided with flange structure at both ends.

3. The aerodynamic diaphragm stand valve of claim 1, wherein, The valve cover component (2) is stably connected with the valve body (1) through the bolt (14).

4. The aerodynamic diaphragm stand valve of claim 1, wherein, The valve core assembly (4) includes a thickened shaft (41), and the thickened shaft (41) is connected with the sealing valve core (42) at the bottom through welding.

5. The aerodynamic diaphragm stand valve of claim 1, wherein, The actuator (7) is provided with a fixed disc (15) inside, a plurality of compression springs (16) are arranged on the fixed disc (15), and an elastic adjusting piece (17) is arranged below the fixed disc (15).

6. The aerodynamic diaphragm stand valve of claim 5, wherein, The actuator (7) includes two upper and lower diaphragms, and the upper and lower diaphragms are fixedly connected through a plurality of bolt assemblies (24); The upper diaphragm of the actuator (7) is provided with an adjusting screw (23), and the lower diaphragm is provided with a pressure pipe interface (18).

7. The aerodynamic diaphragm stand valve of claim 1, wherein, The lower end of the actuator (7) is provided with an upper support plate (19), and the stand column (8) is connected through the upper support plate (19).

8. The pneumatic diaphragm cartridge valve of claim 7, wherein, The lower end of the stand column (8) is provided with a lower support plate (20), and the valve cover component (2) is connected through the lower support plate (20), and the lower support plate (20) is provided with a nipple (21).

9. The pneumatic diaphragm cartridge valve of claim 7, wherein, The stand column (8) is provided with four stand columns, and the stand column (8) is provided with a scale card (22), and the scale card (22) is fixed on the stand column (8) through a hoop.

10. The aerodynamic diaphragm stand valve of claim 1, wherein, The connecting block (12) is a detachable symmetrical connecting structure, and the upper and lower structures are fixedly connected through the inner hexagonal bolt.

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