Novel electric single-seat regulating valve

Abstract

The utility model provides a novel electric single-seat regulating valve which comprises a valve body, a valve rod, a valve core, an upper end cover, a lower end cover and an electric actuating mechanism, the lower end cover is fixedly installed at the lower end of the valve body through a screw, and the upper end cover is fixedly installed at the upper end of the valve body through a screw. The upper end cover and the lower end cover are oppositely installed in through holes in the upper end and the lower end of the valve body and connected in a sealed mode, the lower end cover is provided with a guide sleeve, lifting of the valve rod is positioned, and the attaching stability of the valve element and the valve seat is improved; the sealing assembly isolates liquid leakage in the valve body; the device has the advantages of being small in leakage amount, large in flow capacity and small in unbalanced force.

Description

Technical Field

[0001] The utility model relates to the technical field of valves, in particular to a novel electric single-seat regulating valve. Background Art

[0002] In industrial production, with the continuous improvement of automation, the control valve, as the terminal original in process control, receives the DC current signal from the regulating instrument, changes the flow of the regulated medium, and keeps the controlled process parameters at a given value; it is widely used in production automation control in industrial sectors such as electricity, metallurgy, chemical industry, petroleum, light industry, pharmaceuticals, and papermaking.

[0003] At present, regulating valves generally have problems of large leakage and unbalanced force. The present invention provides a new type of electric single-seat regulating valve to improve the above problems. Utility Model Content

[0004] The technical problem solved by the utility model is to provide a novel electric single-seat regulating valve to solve the problems raised in the above background technology.

[0005] The technical problem solved by the utility model is achieved by the following technical solutions: a new type of electric single-seat regulating valve, including a valve body, a valve stem, a valve core, an upper end cover, a lower end cover and an electric actuator, the lower end of the valve body is fixedly installed with a lower end cover by screws, the upper end of the valve body is fixedly installed with an upper end cover by screws, the upper end cover and the lower end cover are relatively installed in the through holes at the upper and lower ends of the valve body and are sealed and connected, the upper end of the upper end cover is fixedly installed with an electric actuator, the valve stem passes through the middle of the upper end cover and enters the valve body, and the upper end of the valve stem is transmission-connected to the electric actuator The valve stem is located in the valve body and is fixedly equipped with a valve core and extends to the outer end of the valve core. A flow channel for liquid flow is provided in the valve body, one end of the flow channel is an inlet pipe, and the other end is an outlet pipe. A valve seat corresponding to the valve core is provided at a corresponding position between the inlet pipe and the outlet pipe. The valve core is installed at the upper end of the valve seat and is adjusted to fit and separate with the valve seat by moving the valve stem, so as to control the disconnection and flow of the flow channel. A bushing is provided at the lower end of the valve stem located at the upper end cover, and a sliding cylinder is provided at the valve stem corresponding to the bushing. The sliding cylinder is slidably connected in the bushing, and a sealing assembly is provided at the upper end of the valve stem located at the upper end cover.

[0006] Preferably, the sealing assembly includes a stuffing gland, a stuffing box and a pressure plate. The stuffing gland and the stuffing box are sleeved on the outer end of the valve stem and inserted into the sealing hole corresponding to the upper end cover. A gasket is provided at the lower end of the stuffing box. A pressure plate is fitted on the upper end of the stuffing gland, and both sides of the pressure plate are fixedly connected to the upper end cover by studs.

[0007] Preferably, gaskets for enhancing sealing are respectively provided between the upper end cover, the lower end cover and the valve body. The gaskets are placed in corresponding ring grooves of the valve body and are squeezed and sealed by the upper end cover and the lower end cover.

[0008] Preferably, the lower end cover is provided with a guide sleeve corresponding to the valve stem, a guide groove is provided in the center of the guide sleeve, the lower end of the valve stem is slidably connected in the guide groove, and the guide groove positions the valve stem to prevent the valve stem from descending and deviating, resulting in poor sealing.

[0009] Preferably, the electric actuator is a DKZ type actuator, and the electric actuator includes a motor and a handwheel.

[0010] Preferably, the outer ends of the inlet pipe and the outlet pipe are provided with butt-jointed flanges.

[0011] Compared with the prior art, the beneficial effects of the utility model are: the lower end cover of the device is provided with a guide sleeve to position the lifting and lowering of the valve stem and to ensure the stability of the fit between the valve core and the valve seat; the sealing component isolates the liquid leakage in the valve body; the device has the characteristics of less leakage, large flow capacity and smaller unbalanced force. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] FIG1 is a schematic diagram of the structure of the utility model; DETAILED DESCRIPTION

[0013] In order to make the technical means for realizing the utility model, creative features, objectives and effects easy to understand, the utility model is further explained below with reference to specific illustrations.

[0014] As shown in Figure 1,

[0015] In the present embodiment, a novel electric single-seat regulating valve comprises a valve body 1, a valve stem 2, a valve core 3, an upper end cover 4, a lower end cover 5 and an electric actuator 6. The lower end of the valve body 1 is fixedly installed with the lower end cover 5 by screws, and the upper end of the valve body 1 is fixedly installed with the upper end cover 4 by screws. The upper end cover 4 and the lower end cover 5 are relatively installed in the through holes at the upper and lower ends of the valve body 1 and are sealed and connected. The upper end of the upper end cover 4 is fixedly installed with the electric actuator 6. The valve stem 2 passes through the middle of the upper end cover 4 and enters the valve body 1. The upper end of the valve stem 2 is transmission-connected with the electric actuator 6. The valve stem 2 is located in the valve body 1 and is fixedly installed with the valve core 3 and extends to the outer end of the valve core 3. A flow channel 11 for liquid flow is provided in the valve body 1. One end of the flow channel 11 is an inlet pipe 12, and the other end is an outlet pipe 13. A valve seat 14 corresponding to the valve core 3 is provided at a corresponding position between the inlet pipe 12 and the outlet pipe 13. The valve core 3 It is installed on the upper end of the valve seat 14 and adjusts the fit and separation with the valve seat 14 through the movement of the valve stem 2, so as to control the disconnection and flow of the flow channel 11. The valve stem 2 is located at the lower end of the upper end cover 4 and is provided with a bushing 41. The valve stem 2 is provided with a slide 21 corresponding to the bushing 41. The slide 21 is slidably connected in the bushing 41. The valve stem 2 is located at the upper end of the upper end cover 4 and is provided with a sealing assembly.

[0016] In this embodiment, the sealing assembly includes a packing gland 43, a stuffing box 44 and a pressure plate 45. The packing gland 43 and the stuffing box 44 are sleeved on the outer end of the valve stem 2 and inserted into the corresponding sealing hole of the upper end cover 4. A gasket 46 is provided at the lower end of the stuffing box 44. The upper end of the packing gland 43 is fitted with a pressure plate 45. Both sides of the pressure plate 45 are fixedly connected to the upper end cover 4 through studs.

[0017] In this embodiment, gaskets 15 for enhanced sealing are respectively provided between the upper end cover 4 and the lower end cover 5 and the valve body 1 . The gaskets 15 are placed in corresponding grooves of the valve body 1 and squeezed and sealed by the upper end cover 4 and the lower end cover 5 .

[0018] In this embodiment, the lower end cover 5 is provided with a guide sleeve 51 corresponding to the valve stem 2. The center of the guide sleeve 51 is provided with a guide groove. The lower end of the valve stem 2 is slidably connected in the guide groove. The guide groove positions the valve stem to prevent the valve stem 2 from deviating from the downward movement and causing poor sealing.

[0019] In this embodiment, the electric actuator 6 is a DKZ type actuator, and the electric actuator 6 includes a motor and a handwheel.

[0020] In this embodiment, the outer ends of the inlet pipe 12 and the outlet pipe 13 are provided with butt-jointed flanges.

[0021] The working principle of the utility model is as follows: the electric actuator 6 drives the valve stem 2 to move up and down, the valve stem 2 controls the closing and opening of the valve core 3 and the valve seat 14, the liquid entering the pipeline 12 enters the output pipeline 13 through the flow port in the center of the valve seat, and the sealing component on the upper end cover 4 isolates the liquid in the valve body 1 from leakage.

[0022] The above shows and describes the basic principle and main features of the utility model and the advantages of the utility model. Those skilled in the art should understand that the utility model is not limited by the above embodiments. The above embodiments and descriptions are only for explaining the principle of the utility model. Without departing from the spirit and scope of the utility model, the utility model may have various changes and improvements, which fall within the scope of the utility model to be protected. The scope of protection of the utility model is defined by the attached claims and their equivalents.

Claims

1. A new type of electric single-seat regulating valve, including a valve body, a valve stem, a valve core, an upper end cover, a lower end cover and an electric actuator, characterized in that: The lower end of the valve body is fixedly installed with a lower end cover by screws, and the upper end cover is fixedly installed with screws on the upper end of the valve body. The upper end cover and the lower end cover are relatively installed in the through holes at the upper and lower ends of the valve body and are sealed and connected. An electric actuator is fixedly installed on the upper end of the upper end cover. The valve stem passes through the middle of the upper end cover and enters the valve body. The upper end of the valve stem is transmission connected with the electric actuator. The valve stem is located in the valve body and a valve core is fixedly installed thereon and extends to the outer end of the valve core. A flow channel for liquid flow is provided in the valve body. One end of the flow channel is an inlet pipe, and the other end is an outlet pipe. A valve seat corresponding to the valve core is provided at a corresponding position between the inlet pipe and the outlet pipe. The valve core is installed at the upper end of the valve seat and is adjusted to fit and separate with the valve seat by moving the valve stem, so as to control the disconnection and circulation of the flow channel. A bushing is provided at the lower end of the valve stem located at the upper end cover, and a sliding cylinder is provided at the valve stem corresponding to the bushing. The sliding cylinder is slidably connected in the bushing. A sealing assembly is provided at the upper end of the valve stem located at the upper end cover.

2. According to claim 1, a new type of electric single-seat regulating valve is characterized in that: The sealing assembly includes a stuffing gland, a stuffing box and a pressure plate. The stuffing gland and the stuffing box are sleeved on the outer end of the valve stem and inserted into the corresponding sealing holes of the upper end cover. A gasket is provided at the lower end of the stuffing box. A pressure plate is fitted on the upper end of the stuffing gland. Both sides of the pressure plate are fixedly connected to the upper end cover by studs.

3. A new type of electric single-seat regulating valve according to claim 1, characterized in that: Gaskets for enhancing sealing are respectively arranged between the upper end cover, the lower end cover and the valve body. The gaskets are placed in the corresponding ring grooves of the valve body and are squeezed and sealed by the upper end cover and the lower end cover.

4. A new type of electric single-seat regulating valve according to claim 1, characterized in that: The lower end cover is provided with a guide sleeve corresponding to the valve stem, and a guide groove is provided in the center of the guide sleeve. The lower end of the valve stem is slidably connected in the guide groove. The guide groove positions the valve stem to prevent the valve stem from descending and deviating, resulting in poor sealing.

5. The new electric single-seat regulating valve according to claim 1 is characterized in that: The electric actuator is a DKZ type actuator, and the electric actuator includes a motor and a handwheel.

6. The novel electric single-seat regulating valve according to claim 1 is characterized in that: The outer ends of the inlet pipe and the outlet pipe are provided with butt-jointed flanges.

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