Closed single-cylinder regulating valve

Abstract

The utility model relates to the field of gas power generation equipment, in particular to a closed single-cylinder regulating valve which comprises a regulating valve body, a valve body support and a driving unit, the valve body support is fixedly arranged on the top wall of the regulating valve body, and the driving unit is fixedly connected with the top wall of the valve body support; a rubber gasket is clamped between the top wall of the valve body bracket and the bottom wall of the driving unit; an inner cavity of the valve body support is communicated with an inner cavity of the adjusting valve body, the circumferential side wall of the valve body support is of a sealing structure, and a step groove used for containing the adjusting valve body is formed in the bottom of the valve body support. The driving unit is used for driving the regulating valve body to close; according to the adjusting valve, the adjusting valve body is sealed in a multi-layer mode through padding, a first oil seal, a second oil seal, an asbestos gasket, a rubber gasket and a valve body support of a sealing structure, leakage of materials in a pipeline caused by failure of a certain sealing piece is avoided, and the sealing effect of the adjusting valve is improved.

Description

Technical Field

[0001] The present application relates to the field of gas power generation equipment, and in particular to a closed single-cylinder regulating valve. Background Art

[0002] Gas generator sets are new generator sets developed to meet the world's environmental protection requirements and the new market environment. Gas generator sets are composed of gas engines, generators, control cabinets and other components. The gas engine and generator are installed on the same steel chassis. The units use natural gas, wellhead associated gas, coal mine gas, water gas, refinery tail gas, biogas, coke oven gas, blast furnace gas and other combustible gases as fuel. They start quickly and have good economy. Especially due to the demand for high-quality urban life, gas generator sets have been widely used in telecommunications, post offices, banks, libraries, hospitals, hotels and other departments.

[0003] In the field of gas-fired power generation technology, a regulating valve is usually arranged on the gas pipeline to adjust the gas intake volume and thus control the combustion of the gas. The regulating valve is mainly composed of a valve body, a valve disc, a valve stem, a valve seat and other parts; wherein, the valve body is the main body of the entire valve and is used to connect the gas pipeline; the valve disc is connected to the valve stem and is used to control the gas flow; the valve seat is the inlet and outlet of the gas channel and plays a sealing role. The gas flow is adjusted by changing the gap between the valve disc and the valve seat. The valve disc fits tightly with the internal cavity of the valve seat. When the valve disc rotates, the cross-sectional area of ​​the gas channel increases, and the gas flow increases. The flow characteristics of the regulating valve depend on the valve opening and the flow characteristics of the gas.

[0004] In the application of control valves in the field of gas-fired power generation, the sealing of the valve body is an important indicator for evaluating valve performance. Good sealing performance means that the gas-fired generator set can maintain safe and stable operation during long-term operation. The seals of common control valves are prone to aging. When the seals fail, there are no corresponding leakage prevention measures, resulting in poor sealing effect of the control valve. Utility Model Content

[0005] In order to improve the sealing effect of the regulating valve, the present application provides a closed single-cylinder regulating valve.

[0006] The closed single-cylinder regulating valve provided in this application adopts the following technical solution:

[0007] A closed single-cylinder regulating valve comprises a regulating valve body, a valve body bracket and a driving unit, wherein the valve body bracket is fixedly arranged on the top wall of the regulating valve body, and the driving unit is fixedly connected to the top wall of the valve body bracket; a rubber gasket is sandwiched between the top wall of the valve body bracket and the bottom wall of the driving unit;

[0008] The inner cavity of the valve body support is communicated with the inner cavity of the regulating valve body, the circumferential side wall of the valve body support is a sealing structure, and the bottom wall of the valve body support is provided with a step groove for accommodating the regulating valve body;

[0009] The driving unit is used to drive the regulating valve body to open and close.

[0010] By adopting the above technical scheme, a regulating valve is arranged, the valve body bracket is arranged on the regulating valve body, and the driving unit is arranged on the valve body bracket. By starting the driving unit, the opening and closing degree of the regulating valve body is controlled, thereby controlling the flow of the material in the valve body; the valve body bracket is arranged as a sealing structure, thereby avoiding the situation where the sealing effect of the regulating valve body is not good, the valve body bracket seals the regulating valve body and prevents the material from leaking from the regulating valve body; the rubber gasket is clamped between the top wall of the valve body bracket and the bottom wall of the driving unit, and when the sealing of the regulating valve body fails, the rubber gasket seals the valve body bracket, thereby preventing the material from leaking from the gap between the valve body bracket and the driving unit, thereby improving the sealing effect of the end cover.

[0011] In a specific feasible implementation scheme, the regulating valve body includes a valve body, a valve stem, a valve disc, an end cover and a sealing member; a valve cavity is arranged inside the valve body, and the valve cavity includes a horizontal portion and a vertical portion, the horizontal portion passes through the valve body, and the vertical portion is communicated with the horizontal portion; the valve stem passes through the vertical portion and is rotatably connected to the valve body, the valve disc is fixedly connected to the valve stem, and the maximum cross-section of the valve disc matches the inner contour of the horizontal portion; the bottom wall of the end cover is fixedly connected to the top wall of the valve body, the end cover is communicated with the inner cavity of the vertical portion, the end of the valve stem away from the valve disc passes through the end cover, the end cover is engaged in the step groove, and the bottom of the end cover is provided with an interlocking groove for installing the sealing member.

[0012] By adopting the above technical solution, a regulating valve body is designed, in which the valve disc fits tightly on the horizontal part, and the valve stem is fixedly connected to the valve disc. When the valve stem is rotated, the gap between the valve disc and the horizontal part is gradually changed, and the material flows in the gap between the valve disc and the horizontal part. When the gap gradually increases, the material flow rate gradually increases; the designed valve stem facilitates the control of the material flow rate.

[0013] In a specific implementation scheme, the sealing member includes a first oil seal and a second oil seal; the first oil seal is sleeved on the valve stem, and the first oil seal is clamped between the vertical portion and the valve stem; the second oil seal is embedded in the embedding groove, the second oil seal is located between the end cover and the valve stem, and the bottom wall of the second oil seal abuts against the bottom wall of the valve body.

[0014] By adopting the above technical solution, a sealing member is provided, wherein the first oil seal is located between the vertical portion and the valve stem. When the regulating valve is working, it is convenient to prevent the material from leaking from the gap between the vertical portion and the valve stem, thereby enhancing the sealing effect of the regulating valve; the second oil seal is embedded in the engaging groove. When the first oil seal fails, the second oil seal is convenient to prevent the material from leaking from the gap between the end cover and the valve stem, thereby further enhancing the sealing effect of the regulating valve.

[0015] In a specific possible implementation manner, the regulating valve body further includes a packing, which is disposed at the bottom end of the vertical portion and is located between the valve body and the valve stem.

[0016] By adopting the above technical solution, the packing is arranged at the bottom end of the vertical part and is located between the valve body and the valve stem. When the valve stem rotates, it is convenient to prevent the material from entering the vertical part from the horizontal part, thereby enhancing the sealing effect of the regulating valve body.

[0017] In a specific possible implementation manner, a limiting boss is integrally provided on the valve stem, and the limiting boss abuts against the top of the packing.

[0018] By adopting the above technical solution, the limiting boss is provided to press the packing tightly in the vertical part, thereby preventing the packing from loosening and shifting when the valve stem rotates, thereby affecting the sealing effect of the packing on the regulating valve body.

[0019] In a specific possible implementation manner, it further includes a ball bearing, which is disposed between the valve stem and the vertical portion, and the ball bearing is located above the first oil seal, and the ball bearing is rotatably connected to the valve stem.

[0020] By adopting the above technical solution, the ball bearing is arranged between the valve stem and the vertical part, which facilitates the rotation of the valve stem in the vertical part, and then facilitates the adjustment of the gap between the horizontal parts of the valve disc, thereby achieving the adjustment of the material flow in the valve cavity.

[0021] In a specific embodiment, it further comprises an asbestos gasket, wherein the asbestos gasket is clamped between the top wall of the valve body and the bottom wall of the end cover.

[0022] By adopting the above technical solution, the asbestos gasket is clamped between the top wall of the valve body and the bottom wall of the end cover. When the seal in the valve body ages, the asbestos gasket seals the regulating valve body to prevent material from leaking from the gap between the valve body and the end cover, thereby improving the sealing effect of the regulating valve.

[0023] In a specific possible implementation scheme, the drive unit includes a drive unit housing and a drive motor, the drive unit housing is connected to the inner cavity of the valve body bracket, the drive motor is fixedly arranged in the drive unit housing, the output shaft of the drive motor extends out of the bottom wall of the drive unit housing, and the output shaft of the drive motor passes through the valve body bracket and is fixedly connected to one end of the valve stem extending out of the end cover.

[0024] By adopting the above technical solution, a driving unit is set up, and the output shaft of the driving motor passes through the valve body bracket and is fixedly connected to one end of the valve stem extending out of the end cover. When the driving motor is started, the valve stem is driven to rotate by the output shaft, and the valve disc rotates with the valve stem, and the gap between the valve disc and the horizontal part changes accordingly, thereby realizing the regulation of the material flow in the valve cavity.

[0025] In summary, the present application includes at least one of the following beneficial technical effects:

[0026] 1. The packing, the first oil seal, the second oil seal, the asbestos gasket, the rubber gasket and the valve body bracket of the sealing structure play a multi-layer sealing role for the regulating valve body, avoiding the leakage of materials in the pipeline due to the failure of a certain seal, and improving the sealing effect of the regulating valve. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] Figure 1 It is a schematic diagram of the overall structure of a closed single-cylinder regulating valve in an embodiment.

[0028] Figure 2 It is a cross-sectional view of a closed single-cylinder regulating valve according to an embodiment.

[0029] Figure 3 yes Figure 2 The enlarged view of part A is intended to illustrate the regulating valve body.

[0030] Figure 4 yes Figure 3 The enlarged view of part B is intended to illustrate the limiting boss.

[0031] Description of the drawings: 1. regulating valve body; 11. valve body; 12. valve stem; 121. limiting boss; 13. valve disc; 14. end cover; 141. fitting groove; 15. sealing member; 151. first oil seal; 152. second oil seal; 16. valve chamber; 161. horizontal portion; 162. vertical portion; 2. valve body bracket; 21. step groove; 3. drive unit; 31. drive unit housing; 32. drive motor; 4. packing; 5. ball bearing; 6. asbestos gasket; 7. rubber gasket. DETAILED DESCRIPTION

[0032] The following is combined with Figure 1-4 This application is described in further detail.

[0033] The embodiment of the present application discloses a closed single-cylinder regulating valve.

[0034] Reference Figure 1 A closed single-cylinder regulating valve comprises a regulating valve body 1, a valve body bracket 2 and a driving unit 3; the valve body bracket 2 is fixedly arranged above the regulating valve body 1, and the driving unit 3 is fixedly connected to the top wall of the valve body bracket 2.

[0035] Reference Figure 2 and Figure 3 The regulating valve body 1 includes a valve body 11, a valve stem 12, a valve disc 13, an end cover 14, a packing 4, a ball bearing 5 and a sealing member 15; a valve cavity 16 is arranged inside the valve body 11, and the valve cavity 16 includes a horizontal portion 161 and a vertical portion 162, the horizontal portion 161 passes through both ends of the valve body 11 in the horizontal direction, and the vertical portion 162 is communicated with the inner cavity of the horizontal portion 161; the valve stem 12 passes through the vertical portion 162 and is rotatably connected to the valve body 11, the valve disc 13 is fixedly connected to the valve stem 12, and the maximum cross-section of the valve disc 13 matches the inner cavity contour of the horizontal portion 161; a packing 4 is arranged at the bottom end of the vertical portion 162, and the packing 4 is located between the valve stem 12 and the valve body 11. When the valve stem 12 rotates, the packing 4 seals the horizontal portion 161 to prevent the material flowing in the horizontal portion 161 from entering the vertical portion 162, so as to ensure the sealing effect of the valve body 11.

[0036] Reference Figure 2 and Figure 3 The bottom wall of the end cover 14 is fixedly connected to the top wall of the valve body 11, and an engaging groove 141 is opened in the middle position of the bottom of the end cover 14, and an asbestos gasket 6 is clamped between the end cover 14 and the top wall of the valve body 11. The asbestos gasket 6 seals the valve body 11 to prevent the material from leaking from the gap between the top wall of the valve body 11 and the end cover 14 after the sealing effect in the valve cavity 16 fails.

[0037] Reference Figure 2 and Figure 3 The sealing member 15 includes a first oil seal 151 and a second oil seal 152. The first oil seal 151 is clamped between the valve stem 12 and the valve body 11, and the first oil seal 151 is located above the packing 4. The first oil seal 151 seals the gap between the valve body 11 and the valve stem 12 to prevent the material from entering the end cover 14 from the gap between the valve stem 12 and the packing 4 after the packing 4 fails; the second oil seal 152 is embedded in the fitting groove 141, and the bottom wall of the second oil seal 152 abuts against the top wall of the valve body 11. The second oil seal 152 seals the gap between the end cover 14 and the valve stem 12 to prevent the material from entering the drive unit 3 from the gap between the valve stem 12 and the end cover 14 after the first oil seal 151 fails; the first oil seal 151 and the second oil seal 152 are coaxially sleeved on the valve stem 12;

[0038] Reference Figure 4A limiting boss 121 is integrally provided on the valve stem 12 , and the limiting boss 121 presses the packing 4 tightly against the vertical portion 162 , thereby preventing the limiting boss 121 from loosening when the valve stem 12 rotates, thereby affecting the sealing effect of the packing 4 on the regulating valve body 1 .

[0039] Reference Figure 2 and Figure 3 The ball bearing 5 is sleeved on the valve stem 12. The ball bearing 5 is located above the first oil seal 151 and between the valve stem 12 and the valve body 11. When the valve stem 12 rotates, the valve stem 12 drives the ball bearing 5 to rotate, and relative motion is generated between the inner and outer rings of the ball bearing 5, which reduces the friction force of the rotation of the valve stem 12 and facilitates the smooth rotation of the valve stem 12 in the vertical portion 162.

[0040] Reference Figure 2 and Figure 3 The valve body bracket 2 is fixedly connected to the top wall of the valve body 11, and a step groove 21 is provided in the middle position of the bottom of the valve body bracket 2. The end cover 14 is engaged in the step groove 21. The circumferential side wall of the valve body bracket 2 is sealed to avoid communication with the external environment. When the material enters the valve body bracket 2 through the end cover 14, the sealing structure of the valve body bracket 2 avoids the material from flowing into the external environment, thereby improving the sealing effect of the regulating valve.

[0041] Reference Figure 2 The drive unit 3 is fixedly connected to the top wall of the valve body bracket 2. The drive unit 3 includes a drive unit shell 31 and a drive motor 32. The drive unit shell 31 is connected to the inner cavity of the end cover 14. The drive motor 32 is fixedly arranged in the drive unit shell 31. The output shaft of the drive motor 32 extends out of the bottom wall of the drive unit shell 31, and the output shaft of the drive motor 32 passes through the valve body bracket 2 and is fixedly connected to the end of the valve stem 12 extending out of the end cover 14; when the drive motor 32 is started, the output shaft of the drive motor 32 drives the valve stem 12 to rotate, and the valve stem 12 drives the valve disc 13 to rotate, and the gap between the valve disc 13 and the horizontal part 161 changes accordingly, and the material flows through the gap between the valve disc 13 and the horizontal part 161. When the gap increases, the material flow rate increases. When the gap is reduced to be completely closed, the material gradually reduces the flow until it stops.

[0042] Reference Figure 2 A rubber gasket 7 is sandwiched between the driving unit 3 and the valve body bracket 2. The rubber gasket 7 seals the valve body bracket 2 to prevent the material from leaking through the gap between the valve body bracket 2 and the driving unit housing 31 when the first oil seal 151 and the second oil seal 152 age and fail, thereby improving the sealing effect of the regulating valve.

[0043] The implementation principle of a closed single-cylinder regulating valve in this embodiment is as follows: when adjusting the material flow in the pipeline, the driving motor 32 is started, the output shaft of the driving motor 32 rotates, and the output shaft of the driving motor 32 drives the valve stem 12 to rotate. The valve stem 12 drives the valve flap 13 to rotate stably with the support of the ball bearing 5. During the rotation of the valve flap 13, the gap between the valve flap 13 and the horizontal part 161 increases or decreases accordingly, and the material flow through the horizontal part 161 increases or decreases accordingly; during the operation of the regulating valve, the sealing member 15 and various gaskets are prone to aging, causing leakage of materials and affecting production; the packing 4 arranged at the bottom end of the vertical part 162 seals the vertical part 162, and the valve stem 12 is The limiting boss 121 provided in the body tightly abuts the packing 4 against the vertical portion 162 to prevent the material from entering the vertical portion 162 through the gap between the valve stem 12 and the valve cavity 16 when the valve stem 12 rotates; when the packing 4 fails, the first oil seal 151 seals the valve cavity 16, and the material enters the end cover 14 through the valve cavity 16; the asbestos gasket provided between the end cover 14 and the top wall of the valve body 11 is convenient for preventing the material from leaking from the gap between the end cover 14 and the top wall of the valve body 11; when the first oil seal 151 fails, the second oil seal 152 embedded in the embedding groove 141 seals the end cover 14 to prevent the material from entering the end cover 14 and then entering the valve body bracket 2 from the gap between the end cover 14 and the valve stem 12.

[0044] In particular, when the material enters the valve body bracket 2, the sealed structure around the valve body bracket 2 seals the valve body bracket 2, thereby preventing the material from leaking through the circumferential side wall of the valve body bracket 2; when the second oil seal 152 fails, the material enters the valve body bracket 2, and the rubber gasket 7 clamped between the drive unit 3 and the valve body bracket 2 prevents the material from leaking from the gap between the valve body bracket 2 and the drive unit housing 31.

[0045] The above are all preferred embodiments of the present application, and the protection scope of the present application is not limited thereto. Therefore, any equivalent changes made according to the structure, shape, and principle of the present application should be included in the protection scope of the present application.

Claims

1. A closed single-cylinder regulating valve, characterized in that: It comprises a regulating valve body (1), a valve body support (2) and a drive unit (3), wherein the valve body support (2) is fixedly arranged on the top wall of the regulating valve body (1), and the drive unit (3) is fixedly connected to the top wall of the valve body support (2); a rubber gasket (7) is sandwiched between the top wall of the valve body support (2) and the bottom wall of the drive unit (3); The inner cavity of the valve body support (2) is in communication with the inner cavity of the regulating valve body (1); the circumferential side wall of the valve body support (2) is a sealing structure; and a step groove (21) for accommodating the regulating valve body (1) is provided at the bottom of the valve body support (2); The driving unit (3) is used to drive the regulating valve body (1) to open and close.

2. A closed single-cylinder regulating valve according to claim 1, characterized in that: The regulating valve body (1) comprises a valve body (11), a valve stem (12), a valve disc (13), an end cover (14) and a sealing member (15); A valve cavity (16) is provided inside the valve body (11), and the valve cavity (16) comprises a horizontal portion (161) and a vertical portion (162), the horizontal portion (161) penetrates the valve body (11), and the vertical portion (162) is communicated with the horizontal portion (161); The valve stem (12) passes through the vertical portion (162) and is rotatably connected to the valve body (11); the valve flap (13) is fixedly connected to the valve stem (12); and the maximum cross-section of the valve flap (13) matches the inner cavity contour of the horizontal portion (161); The bottom wall of the end cover (14) is fixedly connected to the top wall of the valve body (11), the end cover (14) is communicated with the inner cavity of the vertical portion (162), the end of the valve stem (12) away from the valve disc (13) passes through the end cover (14), the end cover (14) is engaged in the step groove (21), and the bottom of the end cover (14) is provided with an engaging groove (141) for installing the sealing member (15).

3. A closed single-cylinder regulating valve according to claim 2, characterized in that: The sealing element (15) comprises a first oil seal (151) and a second oil seal (152); The first oil seal (151) is sleeved on the valve stem (12), and the first oil seal (151) is clamped between the vertical portion (162) and the valve stem (12); The second oil seal (152) is embedded in the embedding groove (141), the second oil seal (152) is located between the end cover (14) and the valve stem (12), and the bottom wall of the second oil seal (152) abuts against the bottom wall of the valve body (11).

4. A closed single-cylinder regulating valve according to claim 2, characterized in that: The regulating valve body (1) further comprises a packing (4), wherein the packing (4) is arranged at the bottom end of the vertical portion (162), and the packing (4) is located between the valve body (11) and the valve stem (12).

5. A closed single-cylinder regulating valve according to claim 4, characterized in that: A limiting boss (121) is integrally provided on the valve stem (12), and the limiting boss (121) abuts against the top of the packing (4).

6. A closed single-cylinder regulating valve according to claim 3, characterized in that: It also includes a ball bearing (5), which is arranged between the valve stem (12) and the vertical portion (162), and the ball bearing (5) is located above the first oil seal (151), and the ball bearing (5) is rotatably connected to the valve stem (12).

7. A closed single-cylinder regulating valve according to claim 2, characterized in that: It also includes an asbestos gasket (6), which is clamped between the top wall of the valve body (11) and the bottom wall of the end cover (14).

8. A closed single-cylinder regulating valve according to claim 7, characterized in that: The drive unit (3) comprises a drive unit housing (31) and a drive motor (32); the drive unit housing (31) is connected to the inner cavity of the valve body bracket (2); the drive motor (32) is fixedly arranged in the drive unit housing (31); the output shaft of the drive motor (32) extends out of the bottom wall of the drive unit housing (31); the output shaft of the drive motor (32) passes through the valve body bracket (2) and is fixedly connected to one end of the valve stem (12) extending out of the end cover (14).

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