Axial flow type regulating valve

Abstract

The utility model provides an axial flow type regulating valve which is characterized in that two ends of a valve body are fixedly connected to an upstream pipeline and a downstream pipeline respectively, a valve seat is arranged in the valve body, an actuator is mounted on the valve body, an actuating end of the actuator is connected to one end of a valve rod, a valve core is mounted at the other end of the valve rod, and the actuator is used for driving the valve rod and the valve core to axially move. The valve element moving in the axial direction can be close to or away from the valve seat, a pointer is installed on the valve rod and provided with a magnetic body, an electromagnetic assembly is slidably installed on the actuator, the magnetic body is used for identifying the displacement distance of the pointer, the valve rod and the valve element relative to the valve seat, and the electromagnetic switch is used for detecting the relative position of the magnetic body. According to the axial-flow type regulating valve, the electromagnetic assembly is used for detecting the relative positions of the magnetic body, the identification pointer and the valve rod, so that the opening degree of the valve element to the valve seat is determined, when the pressure difference in an upstream pipeline and a downstream pipeline and the water flow speed change, a certain opening degree can be kept all the time, it is ensured that water flow is stable, and the axial-flow type regulating valve is low in cost and easy to operate.

Description

Technical Field

[0001] The utility model belongs to the field of regulating valves, in particular to an axial flow regulating valve. Background Art

[0002] Axial flow control valves play a role in flow regulation and control in pipeline systems and have been widely used in process industries such as natural gas transportation and chemical industry. For a long time, axial flow control valves have been used in oil and natural gas transportation systems, especially those with large diameters, small pressure drops, and precise pressure and flow regulation. In the existing technology, due to the application cost, pneumatic actuators are usually configured on axial flow control valves. When in use, the pressure difference and water flow rate fluctuations in the upstream and downstream pipelines will be accompanied by changes in the opening of the control valve, which can easily lead to large fluctuations in flow changes and cause inconvenience in use. Utility Model Content

[0003] In view of this, the utility model aims to propose an axial flow regulating valve to solve the problem of the regulating valve in the prior art that when the pressure difference and water flow rate in the upstream and downstream pipelines fluctuate, the opening of the regulating valve changes, resulting in large fluctuations in flow rate.

[0004] In order to achieve the above object, the technical solution of the utility model is implemented as follows:

[0005] An axial flow regulating valve comprises a valve body, a valve seat, a valve stem and a valve core. The two ends of the valve body are respectively fixedly connected to an upstream pipeline and a downstream pipeline. The valve seat is arranged in the valve body. An actuator is installed on the valve body. The actuator end of the actuator is connected to one end of the valve stem, and the valve core is installed on the other end of the valve stem. The actuator is used to drive the valve stem and the valve core to axially displace. The axially displaced valve core can approach or move away from the valve seat. A pointer is installed on the valve stem. A magnetic body is arranged on the pointer. An electromagnetic assembly is slidably installed on the actuator. The magnetic body is used to mark the displacement distance of the pointer, the valve stem and the valve core relative to the valve seat. The electromagnetic assembly is used to detect the relative position of the magnetic body.

[0006] Furthermore, the valve body is installed with an actuator through a bracket, the electromagnetic component is slidably set on the bracket, and an identification plate is fixedly installed on the bracket, a scale is provided on the identification plate, the identification plate and the electromagnetic component are arranged opposite to each other, one end of the pointer points to the scale, and a magnetic body is installed on the other end of the pointer.

[0007] Furthermore, the actuator is a pneumatic diaphragm, which includes a shell, an inner cavity of which is fixedly mounted a diaphragm, and the lower end of the diaphragm is fixedly connected to one end of a first spring, the other end of the first spring is fixedly connected to the shell, the upper end of the diaphragm and the inner ring of the shell form a closed cavity, and an air nozzle is provided on the shell, the air nozzle is connected to the closed cavity, and the air nozzle is connected to an external air injection device through a pipeline, a mounting seat is provided in the middle of the lower end of the diaphragm, the upper end of the valve stem is fixedly connected to the mounting seat, a second spring is provided on the periphery of the valve stem, and the two ends of the second spring are respectively fixedly connected to the periphery of the valve stem and the inner side of the valve body, and the second spring is used to elastically keep the valve stem and the valve core away from the valve seat.

[0008] Furthermore, a first guide sleeve is arranged at the lower end of the shell, a second guide sleeve is arranged in the valve body, and the periphery of the valve stem is slidably connected to the inner ring of the first guide sleeve and the inner ring of the second guide sleeve respectively.

[0009] Furthermore, the inner ring of the valve cover is provided with a through hole, the periphery of the valve stem is located in the through hole, and a packing is arranged between the periphery of the valve stem and the through hole, and the upper end of the valve cover is sealed with a packing gland, and the periphery of the valve stem is slidably connected to the middle part of the packing gland.

[0010] Furthermore, the electromagnetic component includes a connecting plate, and the connecting plate is an L-shaped structure. A long hole is provided on one side of the connecting plate. The outer periphery of the adjusting bolt is located in the long hole, and the adjusting bolt can slide in the long hole. One end of the adjusting bolt is threadedly connected to the bracket, and the lower limit electromagnetic switch, the median electromagnetic switch and the upper limit electromagnetic switch are installed in sequence from bottom to top on the other side of the connecting plate.

[0011] Furthermore, the lower cross-section of the valve core is a conical structure or an arc structure.

[0012] Furthermore, the inner ring of the valve seat is provided with an annular groove with a V-shaped cross section, and the lower periphery of the valve core can abut against the V-shaped annular groove.

[0013] Compared with the prior art, the axial flow regulating valve described in the utility model has the following beneficial effects: the electromagnetic component is used to detect the relative positions of the magnetic body, the identification pointer and the valve stem, so as to determine the opening of the valve core relative to the valve seat. When the pressure difference in the upstream and downstream pipelines and the water flow rate change, a certain opening can always be maintained to ensure stable water flow. The device is low in cost and easy to operate. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] The accompanying drawings constituting a part of the present invention are used to provide a further understanding of the present invention. The illustrative embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute an improper limitation on the present invention. In the accompanying drawings:

[0015] Figure 1 This is a structural schematic diagram of an axial flow regulating valve according to an embodiment of the utility model;

[0016] Figure 2 for Figure 1 A partial enlarged view of middle A;

[0017] Figure 3 for Figure 1 A partial enlarged view of B in the middle;

[0018] Figure 4 It is a schematic structural diagram of the electromagnetic component described in an embodiment of the utility model.

[0019] Description of reference numerals:

[0020] 1-valve body; 2-valve seat; 21-ring groove; 3-valve core; 4-second guide sleeve; 5-valve cover; 6-packing gland; 7-bracket; 8-pneumatic diaphragm; 81-housing; 82-first spring; 83-diaphragm; 84-sealed cavity; 85-air nozzle; 9-valve stem; 10-pointer; 101-magnetic body; 11-identification plate; 12-electromagnetic assembly; 121-connecting plate; 122-lower limit electromagnetic switch; 123-median value electromagnetic switch; 124-upper limit electromagnetic switch; 125-adjusting bolt; 126-long hole; 13-second spring. DETAILED DESCRIPTION

[0021] It should be noted that, in the absence of conflict, the embodiments of the present invention and the features in the embodiments can be combined with each other.

[0022] In the description of the present utility model, it should be understood that the terms "center", "longitudinal", "lateral", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside" and the like indicate positions or positional relationships based on the positions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present utility model and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present utility model. In addition, the terms "first", "second", etc. are only used for descriptive purposes, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Therefore, features defined as "first", "second", etc. may explicitly or implicitly include one or more of the features. In the description of the present utility model, unless otherwise specified, "multiple" means two or more.

[0023] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installation", "connection" and "connection" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be an indirect connection through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood by specific circumstances.

[0024] The present invention will be described in detail below with reference to the accompanying drawings and in combination with embodiments.

[0025] like Figure 1-Figure 4 As shown, an axial flow regulating valve comprises a valve body 1, a valve seat 2, a valve stem 9 and a valve core 3. The two ends of the valve body 1 are fixedly connected to the upstream pipeline and the downstream pipeline respectively. The valve seat 2 is arranged in the valve body 1. An actuator is installed on the valve body 1. The actuator end of the actuator is connected to one end of the valve stem 9, and the valve core 3 is installed on the other end of the valve stem 9. The actuator is used to drive the valve stem 9 and the valve core 3 to axially displace. The axially displaced valve core 3 can approach or move away from the valve seat 2. A pointer 10 is installed on the valve stem 9, and a magnetic body 101 is arranged on the pointer 10. An electromagnetic assembly 12 is slidably installed on the actuator, and the magnetic body 101 is used to identify the displacement distance of the pointer 10, the valve stem 9 and the valve core 3 relative to the valve seat 2. The electromagnetic switch is used to detect the relative position of the magnetic body 101. The electromagnetic assembly 12 is used to detect the relative position of the magnetic body 101, the identification pointer 10 and the valve stem 9, so as to determine the opening of the valve core 3 relative to the valve seat 2. When the pressure difference in the upstream and downstream pipelines and the water flow rate change, a certain opening can always be maintained to ensure stable water flow. The device is low in cost and easy to operate.

[0026] The valve body 1 is installed with the actuator through the bracket 7, the electromagnetic component 12 is slidably set on the bracket 7, and the identification plate 11 is fixedly installed on the bracket 7. The identification plate 11 is provided with a scale. The identification plate 11 and the electromagnetic component 12 are arranged opposite to each other. One end of the pointer 10 points to the scale, and the other end of the pointer 10 is installed with a magnetic body 101. The magnetic body 101 of this embodiment is a permanent magnet in the prior art. The identification plate 11 is used for the staff to read intuitively, which is convenient for early adjustment and daily maintenance.

[0027] The actuator is a pneumatic diaphragm 8, which includes a housing 81. A diaphragm 83 is fixedly installed in the inner cavity of the housing 81, and the lower end of the diaphragm 83 is fixedly connected to one end of a first spring 82. The other end of the first spring 82 is fixedly connected to the housing 81. The upper end of the diaphragm 83 and the inner circle of the housing 81 form a closed cavity 84, and a gas nozzle 85 is provided on the housing 81. The gas nozzle 85 is connected to the closed cavity 84, and the gas nozzle 85 is connected to an external gas injection device through a pipeline. A mounting seat is provided in the middle of the lower end of the diaphragm 83, and the upper end of the valve stem 9 It is fixedly connected to the mounting seat, and a second spring 13 is arranged on the periphery of the valve stem 9. Both ends of the second spring 13 are respectively fixedly connected to the periphery of the valve stem 9 and the inner side of the valve body 1. The second spring 13 is used for the valve stem 9 and the valve core 3 to elastically move away from the valve seat 2. The gas injection device pushes the diaphragm 83 to control the valve stem 9 to open and close the valve core 3 and the valve seat 2. This is the prior art. The second spring 13 is used to always have an elastic force that keeps the valve core 3 away from the valve seat 2. The gas injection device pushes the diaphragm 83 to offset the elastic force and realize the valve core 3 approaching or moving away from the valve seat 2.

[0028] The inner ring of the valve cover 5 is provided with a through hole, the outer periphery of the valve stem 9 is located in the through hole, and a packing is arranged between the outer periphery of the valve stem 9 and the through hole, and the upper end of the valve cover 5 is covered with a packing gland 6, the outer periphery of the valve stem 9 is slidably connected to the middle part of the packing gland 6, a first guide sleeve is arranged at the lower end of the outer shell 81, and a second guide sleeve 4 is arranged in the valve body 1, and the outer periphery of the valve stem 9 is slidably connected to the inner ring of the first guide sleeve and the inner ring of the second guide sleeve 4 respectively, and the first guide sleeve and the second guide sleeve 4 are both used for limiting the guide of the valve stem 9.

[0029] The electromagnetic assembly 12 includes a connecting plate 121, and the connecting plate 121 is an L-shaped structure. A long hole 126 is provided on one side of the connecting plate 121. The outer periphery of the adjusting bolt 125 is located in the long hole 126, and the adjusting bolt 125 can slide in the long hole 126. One end of the adjusting bolt 125 is threadedly connected to the bracket 7. The lower limit electromagnetic switch 122, the median electromagnetic switch 123 and the upper limit electromagnetic switch 124 are installed in sequence from bottom to top on the other side of the connecting plate 121. The staff can adjust the lower limit electromagnetic switch 122, the median electromagnetic switch 123 and the upper limit electromagnetic switch 124 by sliding the connecting plate 121. 24, the lower limit electromagnetic switch 122, the median electromagnetic switch 123 and the upper limit electromagnetic switch 124 are all electromagnetic switches of the prior art, the lower limit electromagnetic switch 122 is the lower limit position of the movement of the pointer 10, when the magnetic body 101 senses the lower limit electromagnetic switch 122, the external gas injection equipment reduces the air pressure injected into the closed cavity 84, when the pointer 10 moves to the upper limit electromagnetic switch 124, the external gas injection equipment increases the air pressure injected into the closed cavity 84, when the pointer 10 moves to the median electromagnetic switch 123, the external gas injection equipment stops injecting air pressure into the closed cavity 84 and maintains the pressure.

[0030] The lower cross-section of the valve core 3 is a conical structure or an arc structure, and the inner ring of the valve seat 2 is provided with an annular groove 21 with a V-shaped cross-section. The lower periphery of the valve core 3 can abut against the V-shaped annular groove 21, and the lower part of the valve core 3 is made of rubber. When the valve core 3 penetrates into the valve seat 2, the periphery of the valve core 3 presses against the lower inner edge and the upper inner edge of the valve seat 2. During squeezing, the rubber material of the valve core 3 is squeezed and deformed. The V-shaped annular groove 21 is used to stack the pressurized valve core 3 and relieve the pressure on this part of the valve core 3 to increase the service life of the accessories.

[0031] The control method of this embodiment is controlled by a controller. The control circuit of the controller can be implemented by simple programming by technicians in this field. The provision of power is also common knowledge in this field. This article is mainly used to protect mechanical devices. The control method and circuit connection are not explained in detail in this article.

[0032] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. An axial flow regulating valve, comprising a valve body (1), a valve seat (2), a valve stem (9) and a valve core (3), wherein two ends of the valve body (1) are fixedly connected to an upstream pipeline and a downstream pipeline respectively, a valve seat (2) is arranged in the valve body (1), an actuator is installed on the valve body (1), an actuator end of the actuator is connected to one end of the valve stem (9), and a valve core (3) is installed on the other end of the valve stem (9), the actuator is used to drive the valve stem (9) and the valve core (3) to axially displace, and the axially displaced valve core (3) can approach or move away from the valve seat (2), and is characterized in that: A pointer (10) is installed on the valve stem (9), a magnetic body (101) is arranged on the pointer (10), an electromagnetic assembly (12) is slidably installed on the actuator, the magnetic body (101) is used to mark the displacement distance of the pointer (10), the valve stem (9) and the valve core (3) relative to the valve seat (2), and the electromagnetic assembly (12) is used to detect the relative position of the magnetic body (101).

2. An axial flow regulating valve according to claim 1, characterized in that: The valve body (1) is mounted with an actuator via a bracket (7), the electromagnetic assembly (12) is slidably mounted on the bracket (7), and an identification plate (11) is fixedly mounted on the bracket (7), a scale is provided on the identification plate (11), the identification plate (11) and the electromagnetic assembly (12) are arranged opposite to each other, one end of the pointer (10) points to the scale, and the other end of the pointer (10) is mounted with a magnetic body (101).

3. An axial flow regulating valve according to claim 1, characterized in that: The actuator is a pneumatic diaphragm (8), which comprises a shell (81). A diaphragm (83) is fixedly mounted in the inner cavity of the shell (81), and the lower end of the diaphragm (83) is fixedly connected to one end of a first spring (82), and the other end of the first spring (82) is fixedly connected to the shell (81). The upper end of the diaphragm (83) and the inner ring of the shell (81) form a closed cavity (84), and an air nozzle (85) is arranged on the shell (81). The air nozzle (85) is connected to the closed cavity (84), and the air nozzle (85) is connected to an external gas injection device through a pipeline. A mounting seat is arranged in the middle of the lower end of the diaphragm (83), and the upper end of the valve stem (9) is fixedly connected to the mounting seat. A second spring (13) is arranged on the periphery of the valve stem (9), and the two ends of the second spring (13) are respectively fixedly connected to the periphery of the valve stem (9) and the inner side of the valve body (1). The second spring (13) is used to elastically move the valve stem (9) and the valve core (3) away from the valve seat (2).

4. An axial flow regulating valve according to claim 3, characterized in that: A first guide sleeve is arranged at the lower end of the outer shell (81), a second guide sleeve (4) is arranged inside the valve body (1), and the periphery of the valve stem (9) is slidably connected to the inner ring of the first guide sleeve and the inner ring of the second guide sleeve (4) respectively.

5. The axial flow regulating valve according to claim 1, characterized in that: The inner ring of the valve cover (5) is provided with a through hole, the outer periphery of the valve stem (9) is located in the through hole, and a packing is arranged between the outer periphery of the valve stem (9) and the through hole, and the upper end of the valve cover (5) is sealed with a packing gland (6), and the outer periphery of the valve stem (9) is slidably connected to the middle part of the packing gland (6).

6. The axial flow regulating valve according to claim 1, characterized in that: The electromagnetic assembly (12) comprises a connecting plate (121), and the connecting plate (121) is an L-shaped structure. A long hole (126) is provided on one side of the connecting plate (121). The outer periphery of the adjusting bolt (125) is located in the long hole (126), and the adjusting bolt (125) can slide in the long hole (126). One end of the adjusting bolt (125) is threadedly connected to the bracket (7). A lower limit electromagnetic switch (122), a median electromagnetic switch (123) and an upper limit electromagnetic switch (124) are installed in sequence from bottom to top on the other side of the connecting plate (121).

7. The axial flow regulating valve according to claim 1, characterized in that: The lower cross section of the valve core (3) is a conical structure or an arc structure.

8. The axial flow regulating valve according to claim 1, characterized in that: The inner ring of the valve seat (2) is provided with an annular groove (21) with a V-shaped cross section, and the lower periphery of the valve core (3) can abut against the V-shaped annular groove (21).

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