Low-temperature low-leakage heat preservation electric heating regulating valve for nuclear power

Abstract

The utility model discloses a nuclear power low-temperature low-leakage heat preservation electric heating regulating valve which comprises an actuator, the actuator is fixed to the side face of a valve body, and the output end of the actuator is in transmission connection with a driving shaft. The driving shaft penetrates through the first blade assembly and is rotationally connected with the valve body. The driving shaft is in transmission connection with the driven shaft through a rotating arm assembly; the driven shaft penetrates through the second blade assembly and is rotationally connected with the valve body. When the valve is closed, the first blade assembly and the second blade assembly are both tightly attached to the valve seat, and the first blade assembly and the second blade assembly are tightly attached. A first wiring terminal assembly and a second wiring terminal assembly are further fixed to the side face of the valve body, the first wiring terminal assembly is electrically connected with a first electric heating strip in the first blade assembly, and the second wiring terminal assembly is electrically connected with a second electric heating strip in the second blade assembly. The utility model can meet the requirement of stable operation with low leakage rate under the low-temperature condition.

Description

Technical Field

[0001] The utility model belongs to the technical field of regulating valves and relates to a low-leakage thermal insulation electric heating regulating valve for nuclear power at low temperature. Background Art

[0002] The regulating valve is an important part of the nuclear-grade ventilation system. By turning the valve blade to open and close the valve, the regulating effect of opening and closing the ventilation system is achieved. For different ventilation systems, the regulating valve has different internal leakage levels. With the further development of the nuclear power field, the environment in which the valve is used is becoming more and more complex. For example, it needs to work below 0℃ for a long time or for a certain period of time, and a certain leakage amount needs to be met. In order to meet the valve design requirements, this puts higher requirements on the valve structure, and the structure of the regulating valve needs to be further optimized and upgraded.

[0003] Most of the existing valve structures that meet the II level leakage in NB / T20039.2 are suitable for transmission at room temperature. For such structures, under low temperature conditions, it is necessary to consider whether the valve can operate normally, and whether the sealing condition of the valve can be met due to the complexity of its operating environment. Summary of the invention

[0004] In order to achieve the above-mentioned purpose, the utility model provides a low-leakage thermal insulation electric heating regulating valve for nuclear power at low temperature. By arranging heating belts in each blade assembly, as well as arranging blocks, blade sealing strips, etc., heating and thermal insulation functions are realized, which can meet the smooth operation with low leakage under low temperature conditions.

[0005] In order to solve the above technical problems, the technical solution adopted by the utility model is a low-leakage insulated electric heating regulating valve for nuclear power at low temperature, including an actuator, the actuator is fixed to the side of the valve body, and the output end of the actuator is connected to the driving shaft in a transmission manner; the driving shaft passes through the first blade assembly and the driving shaft is rotatably connected to the valve body; the driving shaft and the driven shaft are connected in a transmission manner through a swing arm assembly; the driven shaft passes through the second blade assembly and the driven shaft is rotatably connected to the valve body; when the valve is closed, the first blade assembly and the second blade assembly are both tightly fitted to the valve seat, and the first blade assembly and the second blade assembly are tightly fitted to each other; the side of the valve body is also fixed with a first terminal assembly and a second terminal assembly, the first terminal assembly and the first electric heating strip in the first blade assembly are electrically connected, and the second terminal assembly and the second electric heating strip in the second blade assembly are electrically connected.

[0006] Further, the first blade assembly includes two first side plates, a driving shaft is fixed to the middle part between the two first side plates; a first elliptical tube is fixed between the two first side plates on the side away from the second blade assembly through a first fastener; a pad is fixed between the two first side plates on the side close to the second blade assembly, a blade sealing strip is provided on the pad on the side close to the second blade assembly, and both ends of the blade sealing strip are respectively fixed between the pad and the two first side plates; a first stopper is fixed between the left ends and the right ends of the two first side plates.

[0007] Furthermore, a first shaft end sleeve is provided at one end of the driving shaft away from the actuator; the first electric heating belt passes through the first shaft end sleeve, the first intermediate sleeve and the first elliptical tube in sequence; the first intermediate sleeve is fixedly sleeved on the driving shaft, and the first intermediate sleeve is located on the inner side of the first stop block close to the first shaft end sleeve; the end of the first electric heating belt is sleeved with a first insulating sleeve, and the head end of the first electric heating belt is electrically connected to the first terminal assembly.

[0008] Furthermore, the second blade assembly includes two second side plates, a driven shaft is fixed to the middle part between the two second side plates; a second elliptical tube is fixed between the upper ends and the lower ends of the two second side plates through a second fastener; and a second stopper is fixed between the left ends and the right ends of the two second side plates.

[0009] Furthermore, a second shaft end sleeve is provided at one end of the driven shaft away from the actuator; the second electric heating belt passes through the second shaft end sleeve, the second intermediate sleeve and the second elliptical tube in sequence; the second intermediate sleeve is fixedly sleeved on the driven shaft and is located on the inner side of the second stop block close to the second shaft end sleeve; the end of the second electric heating belt is sleeved with a second insulating sleeve, and the head end of the second electric heating belt is electrically connected to the second terminal assembly.

[0010] Furthermore, the sides of the first intermediate sleeve, the second intermediate sleeve, the first shaft end sleeve and the second shaft end sleeve are provided with through holes, the shapes of which are adapted to the shapes of the corresponding electric heating belts; the sides of the first insulating sleeve and the second insulating sleeve are provided with grooves, the shapes of which are adapted to the shapes of the corresponding electric heating belts.

[0011] Furthermore, a first O-ring is provided between the driving shaft and the first shaft end sleeve; a second O-ring is provided between the first shaft end sleeve and a support on the side of the valve body; and a rubber pad is provided between the support and the first terminal assembly.

[0012] The beneficial effects of the utility model are:

[0013] 1. The utility model provides heating belts in the first blade assembly and the second blade assembly to ensure that the blades can operate normally at low temperatures.

[0014] 2. The utility model provides a stopper in the first blade assembly and the second blade assembly, which not only plays a role of dustproof sealing, but also plays a certain role of heat preservation.

[0015] 3. The two blade assemblies of the utility model are connected by the cooperation of the blade sealing strip and the elliptical tube, so that the softness of the sealing strip and the hardness of the elliptical tube are combined, thereby improving the sealing effect.

[0016] 4. The utility model supports, fixes and insulates the driving shaft and the driven shaft by means of the intermediate sleeve and the shaft end sleeve, while the insulating sleeve protects the electric heating belt and prevents leakage. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0018] Figure 1 It is a schematic diagram of the structure of a regulating valve according to an embodiment of the utility model.

[0019] Figure 2 yes Figure 1 AA section view.

[0020] Figure 3 yes Figure 1 BB cross-sectional view.

[0021] Figure 4 yes Figure 1 Enlarged view of point I in the middle.

[0022] Figure 5 It is a structural schematic diagram of the first blade assembly of an embodiment of the utility model.

[0023] Figure 6 yes Figure 5 CC cross-sectional view.

[0024] Figure 7 It is a structural schematic diagram of the second blade assembly of an embodiment of the utility model.

[0025] Figure 8 yes Figure 7 DD cross-sectional view.

[0026] In the figure, 1. actuator, 2. first blade assembly, 3. second blade assembly, 4. first terminal assembly, 5. second terminal assembly, 6. valve seat, 7. rubber pad, 8. first O-ring, 9. second O-ring, 10. support, 11. driving shaft, 12. first stopper, 13. first insulating sleeve, 14. first intermediate sleeve, 15. first shaft end sleeve, 16. first elliptical tube, 17. first electric heating belt, 18. first fastener, 19. first side plate, 20. gasket, 21. blade sealing strip, 22. driven shaft, 23. second stopper, 24. second insulating sleeve, 25. second intermediate sleeve, 26. second shaft end sleeve, 27. second elliptical tube, 28. second electric heating belt, 29. second fastener, 30. second side plate, 31. valve body, 32. swing arm assembly. DETAILED DESCRIPTION

[0027] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0028] like Figure 1 to Figure 8 As shown, the utility model provides a low-leakage thermal insulation electric heating regulating valve for nuclear power at low temperature, including an actuator 1, which is fixed to the side of the valve body 31, and the output end of the actuator 1 is transmission-connected to the driving shaft 11; the driving shaft 11 passes through the first blade assembly 2 and is rotationally connected to the valve body 31; the driving shaft 11 is transmission-connected to the driven shaft 22 through the swing arm assembly 32; the driven shaft 22 passes through the second blade assembly 3 and is rotationally connected to the valve body 31; when the valve is closed, the first blade assembly 2 and the second blade assembly 3 are both tightly fitted to the valve seat 6, and the first blade assembly 2 and the second blade assembly 3 are tightly fitted to each other; the side of the valve body 31 is also fixed with a first terminal assembly 4 and a second terminal assembly 5, which are respectively used to control the temperature of the electric heating belts in the first blade assembly 2 and the second blade assembly 3.

[0029] In some embodiments, the first blade assembly 2 includes two first side plates 19, and the driving shaft 11 is fixed to the middle part between the two first side plates 19; the first elliptical tube 16 is fixed between the two first side plates 19 on the side away from the second blade assembly 3 through the first fastener 18; a pad 20 is fixed between the two first side plates 19 on the side close to the second blade assembly 3, and a blade sealing strip 21 is provided on the side of the pad 20 close to the second blade assembly 3, and the two ends of the blade sealing strip 21 are respectively fixed between the pad 20 and the two first side plates 19; when the blade is rotated and closed, the blade sealing strip 21 and the second elliptical tube 27 in the second blade assembly 3 are squeezed against each other to form a seal, and at the same time, the pad 20 supports the blade sealing strip 21 to make its sealing effect better. A first stopper 12 is fixed between the left and right ends of the two first side plates 19. The first stopper 12 not only plays a role of dustproof sealing, but also plays a certain role of heat preservation. A first shaft end sleeve 15 is provided at the end of the driving shaft 11 away from the actuator 1. The first electric heating belt 17 passes through the first shaft end sleeve 15, the first intermediate sleeve 14 and the first elliptical tube 16 in sequence. The first intermediate sleeve 14 is fixedly sleeved on the driving shaft 11, and the first intermediate sleeve 14 is located on the inner side of the first stopper 12 near the first shaft end sleeve 15. The first insulating sleeve 13 is sleeved at the end of the first electric heating belt 17, and the head end of the first electric heating belt 17 is electrically connected to the first terminal assembly 4. The first intermediate sleeve 14 and the first shaft end sleeve 15 play a role of supporting, fixing and heat preservation for the driving shaft 11, and the first insulating sleeve 13 plays a role of protecting the first electric heating belt 17 to prevent leakage.

[0030] In some embodiments, the second blade assembly 3 includes two second side plates 30, and the driven shaft 22 is fixed to the middle part between the two second side plates 30; a second elliptical tube 27 is fixed between the upper ends and the lower ends of the two second side plates 30 through a second fastener 29; a second stopper 23 is fixed between the left ends and the right ends of the two second side plates 30, and the second stopper 23 can not only play a role of dustproof sealing, but also play a certain role of heat preservation; a second shaft end sleeve 26 is provided at the end of the driven shaft 22 away from the actuator 1; the second electric heating belt 28 passes through the second shaft end sleeve 26, the second intermediate sleeve 25 and the second elliptical tube 27 in sequence; the second intermediate sleeve 25 is fixedly sleeved on the driven shaft 22 and is located on the inner side of the second stopper 23 on the side close to the second shaft end sleeve 26; the end of the second electric heating belt 28 is sleeved with a second insulating sleeve 24, and the head end of the second electric heating belt 28 is electrically connected to the second terminal assembly 5. The second intermediate sleeve 25 and the second shaft end sleeve 26 support, fix and insulate the driven shaft 22 , while the second insulating sleeve 24 protects the second electric heating belt 28 to prevent leakage.

[0031] In some embodiments, the sides of the first intermediate sleeve 14, the second intermediate sleeve 25 and the first shaft end sleeve 15, the second shaft end sleeve 26 are provided with through holes, the shapes of the through holes are adapted to the appearance of the corresponding electric heating belts; the sides of the first insulating sleeve 13 and the second insulating sleeve 24 are provided with grooves, the shapes of the grooves are adapted to the appearance of the corresponding electric heating belts.

[0032] In some embodiments, a first O-ring 8 is provided between the driving shaft 11 and the first shaft end sleeve 15 for sealing; a second O-ring 9 is provided between the first shaft end sleeve 15 and the support 10 on the side of the valve body 31 for sealing; a rubber pad 7 is provided between the support 10 and the first terminal assembly 4 for sealing.

[0033] The actuator 1 in the valve outputs torque, driving the first blade assembly 2 and the second blade assembly 3 to rotate, thereby realizing the opening and closing of the valve. Among them, in the first blade assembly 2, the driving shaft 11 rotates to realize the 90° rotation of the blade. The first electric heating belt 17 is added to this structure to ensure that the blade can operate normally at low temperatures. At the same time, the first block 12 is installed at both ends of the first side plate 19, which not only plays the role of dustproof sealing, but also plays a certain role in heat preservation. Moreover, the thermal conductivity of the metal can also play a certain heating role on the driving shaft 1. Similarly, the second blade assembly 3 also has the same effect as the first blade assembly 2. When such a blade structure is assembled, it realizes the combination of elasticity and rigidity, which can achieve a good sealing effect.

[0034] Each embodiment in this specification is described in a related manner, and the same or similar parts between the embodiments can be referenced to each other, and each embodiment focuses on the differences from other embodiments.

[0035] The above description is only a preferred embodiment of the present invention and is not intended to limit the protection scope of the present invention. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention are included in the protection scope of the present invention.

Claims

1. A low-leakage, thermally insulated, electrically heated regulating valve for nuclear power, comprising an actuator (1), characterized in that: The actuator (1) is fixed to the side of the valve body (31), and the output end of the actuator (1) is connected to the driving shaft (11) in a transmission manner; the driving shaft (11) passes through the first blade assembly (2) and is rotationally connected to the valve body (31); the driving shaft (11) is connected to the driven shaft (22) through the swing arm assembly (32); the driven shaft (22) passes through the second blade assembly (3) and is rotationally connected to the valve body (31); when the valve is closed, the first blade assembly (2) is in a rotational connection with the driven shaft (22); The valve body (31) is a valve body having a first connection terminal assembly (4) and a second connection terminal assembly (5). The first connection terminal assembly (4) and the second connection terminal assembly (5) are both tightly fitted to the valve seat (6), and the first connection terminal assembly (2) and the second connection terminal assembly (3) are tightly fitted to each other. The side surface of the valve body (31) is also fixed with a first connection terminal assembly (4) and a second connection terminal assembly (5). The first connection terminal assembly (4) and the first electric heating belt (17) in the first blade assembly (2) are electrically connected, and the second connection terminal assembly (5) and the second electric heating belt (28) in the second blade assembly (3) are electrically connected.

2. The low-leakage insulation electric heating regulating valve for nuclear power at low temperature according to claim 1 is characterized in that: The first blade assembly (2) comprises two first side plates (19), a driving shaft (11) being fixed to a middle portion between the two first side plates (19); a first elliptical tube (16) being fixed between the two first side plates (19) on a side away from the second blade assembly (3) via a first fastener (18); a pad (20) being fixed between the two first side plates (19) on a side close to the second blade assembly (3), a blade sealing strip (21) being provided on a side of the pad (20) close to the second blade assembly (3), and two ends of the blade sealing strip (21) being respectively fixed between the pad (20) and the two first side plates (19); and a first stopper (12) being fixed between the left ends and the right ends of the two first side plates (19).

3. The low-leakage insulation electric heating regulating valve for nuclear power at low temperature according to claim 2 is characterized in that: A first shaft end sleeve (15) is provided at one end of the driving shaft (11) away from the actuator (1); the first electric heating belt (17) passes through the first shaft end sleeve (15), the first intermediate sleeve (14) and the first elliptical tube (16) in sequence; the first intermediate sleeve (14) is fixedly sleeved on the driving shaft (11), and the first intermediate sleeve (14) is located on the inner side of the first stopper (12) close to the first shaft end sleeve (15); the end of the first electric heating belt (17) is sleeved with a first insulating sleeve (13), and the head end of the first electric heating belt (17) is electrically connected to the first terminal assembly (4).

4. A low-leakage insulation electric heating regulating valve for nuclear power at low temperature according to any one of claims 1 to 3, characterized in that: The second blade assembly (3) comprises two second side plates (30), a driven shaft (22) being fixed to a middle portion between the two second side plates (30); a second elliptical tube (27) being fixed between the upper ends and the lower ends of the two second side plates (30) via a second fastener (29); and a second stopper (23) being fixed between the left ends and the right ends of the two second side plates (30).

5. A low-leakage thermal insulation electric heating regulating valve for nuclear power at low temperature according to claim 4, characterized in that: A second shaft end sleeve (26) is provided at one end of the driven shaft (22) away from the actuator (1); the second electric heating belt (28) passes through the second shaft end sleeve (26), the second intermediate sleeve (25) and the second elliptical tube (27) in sequence; the second intermediate sleeve (25) is fixedly sleeved on the driven shaft (22) and is located on the inner side of the second stopper (23) close to the second shaft end sleeve (26); the end of the second electric heating belt (28) is sleeved with a second insulating sleeve (24), and the head end of the second electric heating belt (28) is electrically connected to the second terminal assembly (5).

6. The low-leakage insulation electric heating regulating valve for nuclear power at low temperature according to claim 3, characterized in that: The first intermediate sleeve (14), the second intermediate sleeve (25), the first shaft end sleeve (15), and the second shaft end sleeve (26) are provided with through holes on their sides, and the shapes of the through holes are adapted to the shapes of the corresponding electric heating belts; the first insulating sleeve (13) and the second insulating sleeve (24) are provided with grooves on their sides, and the shapes of the grooves are adapted to the shapes of the corresponding electric heating belts.

7. The low-leakage insulation electric heating regulating valve for nuclear power at low temperature according to claim 3 is characterized in that: The driving shaft (11) and the first shaft end sleeve (15) are provided with a first O-ring (8); a second O-ring (9) is provided between the first shaft end sleeve (15) and a support (10) on the side of the valve body (31); and a rubber pad (7) is provided between the support (10) and the first terminal assembly (4).

Images