Pilot valve for hierarchical control of temperature and pressure

Abstract

The utility model relates to the technical field of pilot valves, in particular to a pilot valve capable of controlling temperature and pressure in a grading mode, which comprises a valve body, a leading-in head, a leading-out head, an adjusting frame and an electric cabinet, a valve rod assembly is arranged in the valve body, a lower valve assembly is arranged on the lower side of the valve rod assembly, and a sealing ring seat is arranged in the valve body and located on the lower side of the lower valve assembly. An upper valve assembly is arranged at the position, located on the upper side of the lower valve assembly, in the valve body, and a diaphragm is arranged at the upper end in the valve body. The structure of the hierarchical control pressure pilot valve is changed through the lower valve assembly, the sealing ring seat and the upper valve assembly, so that the hierarchical control pressure pilot valve has the temperature hierarchical control effect, the compactness is improved, the pressure of the first spring is automatically adjusted by electrically adjusting the telescopic rod and the pressing plate, and the safety is improved. And the size of the clamping position of the lower valve assembly and the upper valve assembly is automatically adjusted through the motor, the transmission gear and the driven gear, and use convenience is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of pilot valves, in particular to a pilot valve for controlling temperature and pressure in stages. Background Art

[0002] The pilot valve consists of a valve body, a lower valve disc, a push rod, a vent joint, an upper valve disc, a spring and a relief valve, and is mostly used for gas diversion operations.

[0003] However, currently, pilot valves for graded temperature and pressure control on the market generally use two valve bodies connected in series to perform graded temperature and pressure control. This method occupies more installation positions, affecting installation efficiency. The graded temperature and pressure control requires manual operation, which is less convenient to use. Therefore, those skilled in the art provide a pilot valve for graded temperature and pressure control to solve the problems raised in the above background technology. Utility Model Content

[0004] The utility model aims to provide a pilot valve for controlling temperature and pressure in stages, so as to solve the problems raised in the above-mentioned background technology.

[0005] In order to achieve the above purpose, the utility model provides the following technical solutions:

[0006] A pilot valve for controlling temperature and pressure in stages, comprising a valve body, an inlet head, an outlet head, an adjustment frame and an electric control box, wherein the inlet head is located at the lower end of one side of the valve body, the outlet head is located at the upper end of the other side of the valve body, the adjustment frame is located at the upper end of the valve body, the electric control box is located at one side of the adjustment frame, a valve stem assembly is arranged inside the valve body, a lower valve assembly is arranged at the lower side of the valve stem assembly, a sealing ring seat is arranged inside the valve body at the lower side of the lower valve assembly, and an upper valve assembly is arranged inside the valve body at the upper side of the lower valve assembly Part, a diaphragm is arranged at the internal upper end position of the valve body, a first spring is arranged on the outer side of the valve stem assembly at the upper side position of the valve body, an electric adjustment telescopic rod is installed at the inner upper end position of the adjusting frame, a pressure plate is arranged on the lower side of the electric adjustment telescopic rod, a driven gear is arranged on the upper side of the adjusting frame at the upper end position of the valve stem assembly, a motor is installed on the inner side of the adjusting frame, a transmission gear is arranged on the upper side of the adjusting frame at a position corresponding to the motor, a temperature sensor is installed at the lower end of the electric control box, and a pressure sensor is installed at the upper end of the introduction head.

[0007] As a further solution of the utility model: the upper valve assembly includes a fixed block, a guide slide rod is arranged inside the fixed block, an upper valve block is arranged on the lower side of the guide slide rod, a second spring is arranged on the outer side of the guide slide rod at the corresponding side position of the fixed block and the upper valve block, the lower valve assembly includes a lower valve block, an insert block is arranged on the lower side of the lower valve block, and an adjusting block is arranged on the outer side of the lower valve block.

[0008] As a further solution of the utility model: the valve stem assembly includes an inner valve stem, an outer valve stem is arranged at the upper end of the inner valve stem, a sliding bar is arranged at the upper end position of the outer side of the inner valve stem, a first bearing is installed at the lower end position of the outer side of the inner valve stem, and a second bearing is installed on the outer side of the outer valve stem.

[0009] As a further solution of the utility model: the output end of the introduction head is connected to the lower end of the valve body, the lower end of the introduction head is connected to the upper end of the valve body through a sealing ring seat, the upper end of the valve body is connected to the input end of the outlet head, the output ends of the pressure sensor and the temperature sensor are electrically connected to the input end of the electric control box, and the output end of the electric control box is electrically connected to the input ends of the electric adjustable telescopic rod and the motor respectively.

[0010] As a further solution of the utility model: the lower valve assembly slides at the internal position of the valve body, the valve stem assembly slides at the upper end position of the valve body, the valve stem assembly rotates at the internal position of the diaphragm, the pressure plate slides at the outer position of the valve stem assembly through the electric adjustment telescopic rod, and the upper end of the valve stem assembly rotates at the upper end position of the adjustment frame.

[0011] As a further solution of the utility model: the fixed block is fixed at the internal position of the valve body, the upper end of the guide slide rod slides at the internal position of the fixed block, the upper valve block slides at the internal position of the valve body through the guide slide rod, the insert block is located at the internal position of the sealing ring seat, and the lower side of the upper valve block slides at the upper side of the lower valve block.

[0012] As a further solution of the utility model: the outer valve stem is rotated to the upper end position of the adjustment frame through the guide sliding rod, the inner valve stem is rotated to the internal position of the diaphragm through the first bearing, the inner valve stem slides at the internal position of the outer valve stem, and the sliding bar slides at the inner side position of the outer valve stem.

[0013] Compared with the prior art, the beneficial effects of the utility model are:

[0014] 1. The utility model changes the structure of the pilot valve for graded temperature and pressure control through the lower valve assembly, the sealing ring seat and the upper valve assembly to adjust the flow rate of the exported material, so that it has the effect of graded temperature control, improves the compactness of the pilot valve for graded temperature and pressure control, reduces the size of the installation position, and improves the installation efficiency;

[0015] 2. The pressure of the first spring is automatically adjusted by the electrically adjustable telescopic rod and the pressure plate, and the size of the engagement portion between the lower valve assembly and the upper valve assembly is automatically adjusted by the motor, the transmission gear and the driven gear, thereby improving the convenience of use. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 A schematic diagram of the structure of a pilot valve for staged temperature and pressure control;

[0017] Figure 2 A perspective view of a pilot valve for staged control of temperature and pressure;

[0018] Figure 3 A schematic diagram of the structure of the upper valve assembly in a pilot valve for graded temperature and pressure control;

[0019] Figure 4 A schematic diagram of the structure of the lower valve assembly of the pilot valve for graded temperature and pressure control;

[0020] Figure 5 A schematic diagram of the structure of the valve stem assembly in a pilot valve for staged temperature and pressure control.

[0021] In the figure: 1. valve body; 2. inlet head; 3. outlet head; 4. adjustment frame; 5. electric control box; 6. valve stem assembly; 7. lower valve assembly; 8. sealing ring seat; 9. upper valve assembly; 10. diaphragm; 11. first spring; 12. electric adjustable telescopic rod; 13. pressure plate; 14. driven gear; 15. motor; 16. transmission gear; 17. temperature sensor; 18. pressure sensor; 19. fixing block; 20. guide slide rod; 21. upper valve block; 22. second spring; 23. lower valve block; 24. plug block; 25. adjustment block; 26. inner valve stem; 27. outer valve stem; 28. slide bar; 29. ​​first bearing; 30. second bearing. DETAILED DESCRIPTION

[0022] See also Figures 1 to 5In the embodiment of the utility model, the pilot valve for graded temperature and pressure control includes a valve body 1, an inlet head 2, an outlet head 3, an adjustment frame 4 and an electric control box 5. The inlet head 2 is located at the lower end position of one side of the valve body 1, the outlet head 3 is located at the upper end position of the other side of the valve body 1, the adjustment frame 4 is located at the upper end position of the valve body 1, and the electric control box 5 is located at one side of the adjustment frame 4. A valve stem assembly 6 is arranged inside the valve body 1, a lower valve assembly 7 is arranged at the lower side of the valve stem assembly 6, a sealing ring seat 8 is arranged inside the valve body 1 at the lower side position of the lower valve assembly 7, an upper valve assembly 9 is arranged inside the valve body 1 at the upper side position of the lower valve assembly 7, a diaphragm 10 is arranged at the upper end position of the valve body 1, and the outer side of the valve stem assembly 6 is located at the upper side position of the valve body 1. A first spring 11 is provided, an electric adjustable telescopic rod 12 is installed at the inner upper end of the adjusting frame 4, a pressure plate 13 is provided on the lower side of the electric adjustable telescopic rod 12, a driven gear 14 is provided on the upper side of the adjusting frame 4 at the upper end of the valve stem assembly 6, a motor 15 is installed on the inner side of the adjusting frame 4, a transmission gear 16 is provided at the position of the upper side of the adjusting frame 4 corresponding to the motor 15, a temperature sensor 17 is installed at the lower end of the electric control box 5, a pressure sensor 18 is installed at the upper end of the introduction head 2, the output end of the introduction head 2 is connected with the lower end of the valve body 1, the lower end of the introduction head 2 is connected with the upper end of the valve body 1 through the sealing ring seat 8, the upper end of the valve body 1 is connected with the input end of the outlet head 3, and the output ends of the pressure sensor 18 and the temperature sensor 17 are both It is electrically connected to the input end of the electric control box 5, and the output end of the electric control box 5 is electrically connected to the input ends of the electric adjustment telescopic rod 12 and the motor 15 respectively. The lower valve assembly 7 slides at the internal position of the valve body 1, the valve stem assembly 6 slides at the upper end position of the valve body 1, and the valve stem assembly 6 rotates at the internal position of the diaphragm 10. The pressure plate 13 slides at the outer position of the valve stem assembly 6 through the electric adjustment telescopic rod 12, and the upper end of the valve stem assembly 6 rotates at the upper end position of the adjustment frame 4. First, carry the pilot valve for graded temperature and pressure control to the use position, the outer end of the inlet head 2 is connected to the material pipeline, the outer end of the outlet head 3 is connected to the discharge pipeline, and the temperature sensor 17 is installed in the discharge pipeline. Then, start using it, and the pressure sensor 18 detects the inlet head. 2, transmits the detection data to the inside of the electric control box 5, controls the electric adjustment telescopic rod 12 to run according to the grading needs, and the electric adjustment telescopic rod 12 pushes the pressure plate 13 to move and squeeze the first spring 11 to complete the pressure adjustment. During use, the lower valve assembly 7 slides on the inside of the valve body 1 under the material pressure inside the introduction head 2, and the lower side of the upper valve assembly 9 adaptively adjusts the contact position with the lower valve assembly 7, and the valve stem assembly 6 slides up, and the material is introduced into the upper end of the valve body 1 through the gap between the lower valve assembly 7 and the upper valve assembly 9, and is discharged through the outlet head 3. The temperature sensor 17 detects the temperature of the material in the discharge pipe, transmits the detection data to the inside of the electric control box 5, and controls the motor 15 to run according to the grading needs, and the motor 15 drives the transmission gear 16 to rotate.The transmission gear 16 drives the driven gear 14 to rotate, the driven gear 14 drives the valve stem assembly 6 to rotate, and the valve stem assembly 6 drives the lower valve assembly 7 to rotate, and adjusts the opening size of the lower valve assembly 7 and the upper valve assembly 9, thereby completing the temperature adjustment.

[0023] exist Figure 2 , 3 4: The upper valve assembly 9 includes a fixed block 19, a guide slide rod 20 is arranged inside the fixed block 19, an upper valve block 21 is arranged on the lower side of the guide slide rod 20, and a second spring 22 is arranged on the outer side of the guide slide rod 20 at the corresponding side position of the fixed block 19 and the upper valve block 21. The lower valve assembly 7 includes a lower valve block 23, an insert block 24 is arranged on the lower side of the lower valve block 23, and an adjusting block 25 is arranged on the outer side of the lower valve block 23. The fixed block 19 is fixed at the internal position of the valve body 1, the upper end of the guide slide rod 20 slides at the internal position of the fixed block 19, the upper valve block 21 slides at the internal position of the valve body 1 through the guide slide rod 20, the insert block 24 is located at the internal position of the sealing ring seat 8, and the lower side of the upper valve block 21 slides at the upper side position of the lower valve block 23. The electric adjustment telescopic rod 12 is controlled to operate according to the grading needs. The electric adjustment telescopic rod 12 pushes the pressure plate 13 to move and squeeze the first spring 11 to complete the pressure adjustment. During use, the guide Under the material pressure inside the inlet head 2, the lower valve assembly 7 slides on the inside of the valve body 1, the second spring 22 contracts, the upper end of the guide slide rod 20 slides inside the fixed block 19, and the position of the upper valve block 21 is adaptively adjusted. The plug block 24 slides out of the sealing ring seat 8, and the upper end of the inner valve stem 26 slides inside the outer valve stem 27. The slide bar 28 prevents the connection between the inner valve stem 26 and the outer valve stem 27 from rotating. The material is introduced into the upper end of the valve body 1 through the gap between the adjusting block 25 and the upper valve block 21, and discharged through the outlet head 3. The temperature sensor 17 detects the temperature of the material in the discharge pipe and transmits the detection data to the inside of the electric control box 5. The motor 15 is controlled to run according to the classification needs. The motor 15 drives the transmission gear 16 to rotate, the transmission gear 16 drives the driven gear 14 to rotate, the driven gear 14 drives the valve stem assembly 6 to rotate, and the valve stem assembly 6 drives the lower valve assembly 7 to rotate, and the opening size of the adjusting block 25 and the upper valve block 21 is adjusted, thereby completing the temperature adjustment.

[0024] exist Figure 2 , 5In: The valve stem assembly 6 includes an inner valve stem 26, an outer valve stem 27 is arranged at the upper end of the inner valve stem 26, a slide bar 28 is arranged at the upper end position of the outer side of the inner valve stem 26, a first bearing 29 is installed at the lower end position of the outer side of the inner valve stem 26, and a second bearing 30 is installed on the outer side of the outer valve stem 27. The outer valve stem 27 rotates at the upper end position of the adjustment frame 4 through the guide slide rod 20, and the inner valve stem 26 rotates at the inner position of the diaphragm 10 through the first bearing 29. The inner valve stem 26 slides at the inner position of the outer valve stem 27, and the slide bar 28 slides on the outer valve stem At the inner position of 27, the motor 15 is controlled to run according to the grading needs, the motor 15 drives the transmission gear 16 to rotate, the transmission gear 16 drives the driven gear 14 to rotate, the driven gear 14 drives the outer valve stem 27 to rotate, the outer valve stem 27 rotates at the upper end of the adjustment frame 4 through the second bearing 30, the outer valve stem 27 drives the inner valve stem 26 to rotate, the inner valve stem 26 rotates on the upper side of the diaphragm 10 through the first bearing 29, the inner valve stem 26 drives the lower valve assembly 7 to rotate, adjusts the opening size of the lower valve assembly 7 and the upper valve assembly 9, thereby completing the temperature regulation.

[0025] The working principle of the utility model is: first, carry the pilot valve for graded temperature and pressure control to the use position, connect the outer end of the inlet head 2 to the material pipeline, connect the outer end of the outlet head 3 to the discharge pipeline, install the temperature sensor 17 into the discharge pipeline, and then start to use it. The pressure sensor 18 detects the pressure inside the inlet head 2, transmits the detection data to the inside of the electric control box 5, and controls the operation of the electric adjustment telescopic rod 12 according to the grading needs. The electric adjustment telescopic rod 12 pushes the pressure plate 13 to move and squeeze the first spring 11 to complete the pressure adjustment. During use, the lower valve assembly 7 slides on the inside of the valve body 1 under the material pressure inside the inlet head 2, and the second spring 22 contracts the upper end of the guide slide rod 20 to slide inside the fixed block 19, adaptively adjusting the position of the upper valve block 21, and the plug block 24 slides out of the sealing ring seat 8. The upper end of the inner valve stem 26 is in The outer valve stem 27 slides inside, and the slide bar 28 prevents the connection between the inner valve stem 26 and the outer valve stem 27 from rotating. The material is introduced into the upper end of the valve body 1 through the gap between the adjusting block 25 and the upper valve block 21, and discharged through the outlet head 3. The temperature sensor 17 detects the temperature of the material in the discharge pipe and transmits the detection data to the inside of the electric control box 5. The motor 15 is controlled to run according to the classification needs. The motor 15 drives the transmission gear 16 to rotate, and the transmission gear 16 drives the driven gear 14 to rotate. The driven gear 14 drives the outer valve stem 27 to rotate. The outer valve stem 27 rotates at the upper end of the adjusting frame 4 through the second bearing 30. The outer valve stem 27 drives the inner valve stem 26 to rotate. The inner valve stem 26 rotates on the upper side of the diaphragm 10 through the first bearing 29. The inner valve stem 26 drives the lower valve block 23 to rotate, and the opening size of the adjusting block 25 and the upper valve block 21 is adjusted, thereby completing the temperature regulation.

[0026] What is described above is only a preferred specific implementation manner of the present invention, but the protection scope of the present invention is not limited thereto. Any technician familiar with the technical field can make equivalent replacements or changes within the technical scope disclosed by the present invention according to the technical scheme and the utility model concept of the present invention, which should be covered by the protection scope of the present invention.

Claims

1. A pilot valve for controlling temperature and pressure in stages, comprising a valve body (1), an inlet head (2), an outlet head (3), an adjustment frame (4) and an electric control box (5), wherein the inlet head (2) is located at the lower end of one side of the valve body (1), the outlet head (3) is located at the upper end of the other side of the valve body (1), the adjustment frame (4) is located at the upper end of the valve body (1), and the electric control box (5) is located at one side of the adjustment frame (4), characterized in that: A valve stem assembly (6) is arranged inside the valve body (1), a lower valve assembly (7) is arranged below the valve stem assembly (6), a sealing ring seat (8) is arranged inside the valve body (1) at a position below the lower valve assembly (7), an upper valve assembly (9) is arranged inside the valve body (1) at a position above the lower valve assembly (7), a diaphragm (10) is arranged at an upper end position inside the valve body (1), a first spring (11) is arranged outside the valve stem assembly (6) at a position above the valve body (1), and the inner portion of the adjusting frame (4) is provided with a spring. An electric adjustable telescopic rod (12) is installed at the upper end position of the side, a pressure plate (13) is arranged on the lower side of the electric adjustable telescopic rod (12), a driven gear (14) is arranged on the upper side of the adjusting frame (4) at the upper end position of the valve stem assembly (6), a motor (15) is installed on the inner side of the adjusting frame (4), a transmission gear (16) is arranged on the upper side of the adjusting frame (4) at a position corresponding to the motor (15), a temperature sensor (17) is installed at the lower end of the electric control box (5), and a pressure sensor (18) is installed at the upper end of the introduction head (2).

2. The pilot valve for controlling temperature and pressure in stages according to claim 1, characterized in that: The upper valve assembly (9) comprises a fixed block (19), a guide slide rod (20) is arranged inside the fixed block (19), an upper valve block (21) is arranged on the lower side of the guide slide rod (20), a second spring (22) is arranged on the outer side of the guide slide rod (20) at the corresponding side position of the fixed block (19) and the upper valve block (21), and the lower valve assembly (7) comprises a lower valve block (23), an insert block (24) is arranged on the lower side of the lower valve block (23), and an adjustment block (25) is arranged on the outer side of the lower valve block (23).

3. The pilot valve for stepwise temperature and pressure control according to claim 1, characterized in that: The valve stem assembly (6) comprises an inner valve stem (26), an outer valve stem (27) is arranged at the upper end of the inner valve stem (26), a slide bar (28) is arranged at the upper end position of the outer side of the inner valve stem (26), a first bearing (29) is installed at the lower end position of the outer side of the inner valve stem (26), and a second bearing (30) is installed at the outer side of the outer valve stem (27).

4. The pilot valve for stepwise temperature and pressure control according to claim 1, characterized in that: The output end of the inlet head (2) is connected to the lower end of the valve body (1), the lower end of the inlet head (2) is connected to the upper end of the valve body (1) through a sealing ring seat (8), the upper end of the valve body (1) is connected to the input end of the outlet head (3), the output ends of the pressure sensor (18) and the temperature sensor (17) are both electrically connected to the input end of the electric control box (5), and the output end of the electric control box (5) is electrically connected to the input ends of the electric adjustable telescopic rod (12) and the motor (15), respectively.

5. The pilot valve for stepwise temperature and pressure control according to claim 1, characterized in that: The lower valve assembly (7) slides at an internal position of the valve body (1), the valve stem assembly (6) slides at an upper end position of the valve body (1), the valve stem assembly (6) rotates at an internal position of the diaphragm (10), the pressure plate (13) slides at an outer position of the valve stem assembly (6) through an electrically adjustable telescopic rod (12), and the upper end of the valve stem assembly (6) rotates at an upper end position of the adjustment frame (4).

6. The pilot valve for stepwise temperature and pressure control according to claim 2, characterized in that: The fixed block (19) is fixed at an internal position of the valve body (1), the upper end of the guide slide rod (20) slides at an internal position of the fixed block (19), the upper valve block (21) slides at an internal position of the valve body (1) through the guide slide rod (20), the insert block (24) is located at an internal position of the sealing ring seat (8), and the lower side of the upper valve block (21) slides at an upper side position of the lower valve block (23).

7. The pilot valve for stepwise temperature and pressure control according to claim 3, characterized in that: The outer valve stem (27) is rotated to the upper end position of the adjustment frame (4) through the guide slide rod (20), the inner valve stem (26) is rotated to the internal position of the diaphragm (10) through the first bearing (29), the inner valve stem (26) slides to the internal position of the outer valve stem (27), and the slide bar (28) slides to the inner side position of the outer valve stem (27).

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