A high-temperature gas-cooled reactor absorption ball drop drive device

Abstract

The present invention provides a high-temperature gas-cooled reactor ball drop drive device, comprising a tank body, a blocking member, and a ball drop rod. The tank body comprises a cavity and a ball drop opening. The blocking member is disposed within the cavity and has a first chamber, the opening of the first chamber communicating with the ball drop opening. The blocking member is provided with a first ball drop hole, the first ball drop hole communicating with the cavity and the first chamber. The ball drop rod is connected to the tank body and rotatable about the axis of the tank body between a first position and a second position. The ball drop rod comprises a blocking portion, the blocking portion being located within the first chamber and connected to the first end of the ball drop rod. The blocking portion has a second chamber with an opening at the lower end, the opening of the second chamber communicating with the ball drop opening. The blocking portion is provided with a second ball drop hole, the second ball drop hole communicating with the second chamber. The high-temperature gas-cooled reactor ball drop drive device according to the present invention can ensure the communication between the first ball drop hole, the second ball drop hole, and the ball drop opening in the absence of braking force, thereby preventing absorption balls from accumulating in the tank body.

Description

Technical Field

[0001] The present invention relates to the field of reactor engineering technology, and in particular to a high-temperature gas-cooled reactor ball drop driving device. Background Art

[0002] The high-temperature gas-cooled reactor is equipped with two independent shutdown systems, namely the control rod system and the absorber ball system. The absorber ball system has the functions of dropping balls to assist in shutdown and pneumatically transporting balls back for standby. Among them, the absorber balls are spherical particles containing neutron absorbing materials (such as boron carbide) with a diameter of millimeters, such as 5-10mm. The absorber balls are stored in a ball storage tank, which is located above the reactor core. When the reactor is operating normally, the ball drop port at the bottom of the ball storage tank is covered and the absorber balls are kept in the ball storage tank. When a ball drop shutdown is required, the absorber balls fall through the ball drop port at the bottom of the ball storage tank into the ball drop channel of the reflective layer on the core side to absorb neutrons to achieve shutdown.

[0003] In related technologies, if the motor of the ball-dropping drive mechanism of the high-temperature gas-cooled reactor loses its braking force, the absorption ball will remain in the ball storage tank for a long time and cannot enter the core, which will cause the high-temperature gas-cooled reactor to malfunction. Manual disassembly and maintenance are the only options, resulting in high work intensity and high risk factor. Summary of the Invention

[0004] The present invention aims to solve one of the technical problems in the related art at least to a certain extent.

[0005] To this end, an embodiment of the present invention provides a high-temperature gas-cooled reactor ball drop driving device, which ensures the connectivity of the ball drop port without braking force, thereby preventing absorption balls from accumulating in the tank body.

[0006] The high temperature gas-cooled reactor ball drop driving device according to an embodiment of the present invention comprises:

[0007] A tank body, the tank body comprising a cavity and a ball drop port, the ball drop port being provided at the bottom of the tank body and communicating with the cavity;

[0008] a blocking member disposed in the cavity and having a first chamber with an opening at a lower end, wherein the opening of the first chamber is in communication with the ball drop port, and a first ball drop hole is provided on a peripheral wall of the blocking member, wherein the first ball drop hole is in communication with the cavity and the first chamber, so that the absorption balls in the cavity are discharged to the ball drop port through the first ball drop hole;

[0009] A ball drop rod is connected to the tank body and is rotatable around the axis of the tank body between a first position and a second position. The first end of the ball drop rod is placed in the cavity, and the second end of the ball drop rod is located outside the tank body.

[0010] The ball drop rod includes a blocking portion, the blocking portion is located in the first cavity and connected to the first end of the ball drop rod, the blocking portion has a second cavity with an opening at the lower end, the opening of the second cavity is connected to the ball drop port, and a second ball drop hole is provided on the peripheral wall of the blocking portion, the second ball drop hole is connected to the second cavity,

[0011] In the first position, the peripheral wall of the blocking portion is used to block the first ball-dropping hole, so as to block the first ball-dropping hole and the ball-dropping opening;

[0012] In the second position, the second ball dropping hole is connected to the first ball dropping hole and the second chamber, so that the absorption balls in the cavity are discharged from the tank body through the first ball dropping hole, the second ball dropping hole, the second chamber and the ball dropping port in sequence.

[0013] When there is no braking force, the ball-dropping drive device of the high-temperature gas-cooled reactor of the embodiment of the present invention rotates the ball-dropping rod so that the ball-dropping rod is in the second position, that is, the second ball-dropping hole is connected to the first ball-dropping hole and the second chamber, so that the absorption balls in the cavity of the tank body are discharged in sequence through the first ball-dropping hole, the second ball-dropping hole, the second chamber and the ball-dropping port.

[0014] Therefore, the high temperature gas-cooled reactor ball drop drive device of the embodiment of the present invention can ensure the communication between the first ball drop hole, the second ball drop hole and the ball drop port without braking force, thereby preventing the absorption balls from accumulating in the tank body.

[0015] In some embodiments, the high-temperature gas-cooled reactor ball drop drive device of an embodiment of the present invention also includes a passive drive component, which is arranged on the tank body and connected to the second end of the ball drop rod. The passive drive component is used to drive the ball drop rod to move between the first position and the second position. In the first position, the passive drive component is movable under the action of gravity.

[0016] In some embodiments, the passive driving member is rotatable around a first axis, and the passive driving member also includes a counterweight. There is a gap between the center of gravity of the passive driving member and the first axis. In the first position, there is an angle between the extension direction of the line connecting the center of gravity of the passive driving member and the first axis and the direction of gravity, wherein the first axis is orthogonal to the axis of the tank body.

[0017] In some embodiments, the ball drop rod includes a first rotating portion, which is provided at the second end of the ball drop rod, and the first rotating portion is used to connect to the passive driving member so that the passive driving member drives the ball drop rod to rotate between the first position and the second position.

[0018] In some embodiments, the high-temperature gas-cooled reactor ball drop drive device also includes a first drive member, which includes a first output part, and the first output part is connected to the first rotating part. The first drive member is started to drive the ball drop rod to rotate between the first position and the second position.

[0019] In some embodiments, the high-temperature gas-cooled reactor ball-dropping drive device of an embodiment of the present invention further includes a disturbance rod, which is rotatably mounted on the ball-dropping rod around the axis of the tank body, wherein the first end of the disturbance rod is located in the cavity and adjacent to the ball-dropping port, and the second end of the disturbance rod is located outside the tank body, and the disturbance rod includes a protrusion, which is adjacent to the first end of the disturbance rod and extends toward the inner wall surface of the tank body.

[0020] In some embodiments, there are multiple protrusions, and the multiple protrusions are divided into multiple groups. Each group of protrusions includes at least two protrusions arranged along the circumference of the disturbance rod, and the multiple groups of protrusions are arranged at intervals along the extension direction of the disturbance rod.

[0021] In some embodiments, the high-temperature gas-cooled reactor ball-dropping drive device of an embodiment of the present invention further includes a second drive member, which includes a second output portion, and the second output portion is connected to the second end of the disturbance rod. The second drive member is started to drive the disturbance rod to rotate.

[0022] In some embodiments, the blocking member further includes a notch opening toward the ball dropping opening, the notch being provided at one end of the blocking member adjacent to the ball dropping opening, and the notch forming the first ball dropping hole.

[0023] In some embodiments, there are a plurality of the first ball-dropping holes, and the plurality of the first ball-dropping holes are arranged at intervals along the circumference of the blocking member. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 It is a structural schematic diagram of a high-temperature gas-cooled reactor ball-dropping drive device according to an embodiment of the present invention.

[0025] Reference numerals:

[0026] Tank body 1; cavity 11; ball drop port 12; ball return port 13;

[0027] Blocking member 2; peripheral side wall 21; top wall 22; connecting hole 221;

[0028] Ball drop rod 3; blocking portion 31; second chamber 32; first rotating portion 33;

[0029] Passive driving member 4; counterweight 41;

[0030] First driving member 5; first output portion 51;

[0031] Second driving member 6; second output portion 61; first gear 62;

[0032] Disturbing rod 7; protruding portion 71; second gear 72. DETAILED DESCRIPTION

[0033] The embodiments of the present invention are described in detail below, and examples of the embodiments are shown in the accompanying drawings. The embodiments described below with reference to the accompanying drawings are exemplary and intended to be used to explain the present invention, but should not be understood as limiting the present invention.

[0034] like Figure 1 As shown, the high temperature gas-cooled reactor ball drop driving device according to an embodiment of the present invention includes a tank body 1 , a blocking member 2 and a ball drop rod 3 .

[0035] Tank body 1 includes a cavity 11 and a ball drop port 12, which is located at the bottom of tank body 1 and communicates with cavity 11. Blocking member 2 is located within cavity 11 and comprises a first chamber with an open lower end, the opening of which communicates with ball drop port 12. A first ball drop hole is provided on the peripheral wall of blocking member 2, connecting cavity 11 and the first chamber, allowing absorption balls in cavity 11 to be discharged into ball drop port 12 through the first ball drop hole.

[0036] Specifically, if Figure 1 As shown, the blocking member 2 is disposed around the ball drop opening 12, and the lower end of the blocking member 2 is connected to the upper end of the ball drop opening 12. The first ball drop opening connects the cavity 11 with the first chamber, so that the absorbent balls in the cavity 11 of the tank body 1 can be discharged through the first ball drop opening, the first chamber, and the ball drop opening 12 in sequence.

[0037] like Figure 1 As shown, the blocking member 2 includes a circumferential side wall 21 and a top wall 22. The circumferential side wall 21 and the top wall 22 form a first chamber. A connecting hole 221 is provided on the top wall 22. The connecting hole 221 passes through the top wall 22 along the axis of the disturbance rod 7. A portion of the first end of the disturbance rod 7 is fitted in the connecting hole 221.

[0038] It is understandable that if Figure 1 As shown, the peripheral side wall 21 of the blocking member 2 is annular and surrounds the ball drop port 12 , and the lower end of the disturbance rod 7 can be fitted into the connecting hole 221 .

[0039] Preferably, a bearing (not shown in the figure) matching the lower end of the disturbance rod 7 is provided in the connecting hole 221. The lower end of the disturbance rod 7 can cooperate with the bearing, thereby facilitating the rotation of the disturbance rod 7 and providing support for the disturbance rod 7.

[0040] The ball dropping rod 3 is connected to the tank body 1, and the ball dropping rod 3 can rotate around the axis of the tank body 1 between a first position and a second position. The first end of the ball dropping rod 3 is placed in the cavity 11, and the second end of the ball dropping rod 3 is located outside the tank body 1. The ball dropping rod 3 includes a blocking portion 31, which is located in the first chamber and connected to the first end of the ball dropping rod 3. The blocking portion 31 has a second chamber 32 with an opening at the lower end. The opening of the second chamber 32 is connected to the ball dropping port 12. A second ball dropping hole is provided on the peripheral wall of the blocking portion 31, and the second ball dropping hole is connected to the second chamber 32.

[0041] In the first position, the peripheral wall of the sealing portion 31 is used to seal the first ball dropping hole to block the first ball dropping hole and the ball dropping port 12; in the second position, the second ball dropping hole is connected to the first ball dropping hole and the second chamber 32, so that the absorption balls in the cavity 11 are discharged from the tank body 1 through the first ball dropping hole, the second ball dropping hole, the second chamber 32 and the ball dropping port 12 in sequence.

[0042] Specifically, if Figure 1 As shown, the lower end of the ball-dropping rod 3 is the first end, and the upper end of the ball-dropping rod 3 is the second end. The blocking portion 31 is connected to the lower end of the ball-dropping rod 3, so that the rotation of the ball-dropping rod 3 can drive the blocking portion 31 to rotate.

[0043] It can be understood that when the ball dropping rod 3 is in the first position, the peripheral wall of the blocking portion 31 blocks the first ball dropping hole, and the absorption balls in the cavity 11 of the tank body 1 cannot pass through the first ball dropping hole. When the ball dropping rod 3 is rotated, when the ball dropping rod 3 is in the second position, the blocking portion 31 rotates, so that the second ball dropping hole is connected to the first ball dropping hole and the second chamber 32, so that the absorption balls in the cavity 11 are discharged from the tank body 1 through the first ball dropping hole, the second ball dropping hole, the second chamber 32 and the ball dropping port 12 in sequence.

[0044] That is to say, when there is no braking force, the high-temperature gas-cooled reactor ball dropping drive device of the embodiment of the present invention rotates the ball dropping rod 3 so that the ball dropping rod 3 is rotated from the first position to the second position, and the second ball dropping hole is connected to the first ball dropping hole and the second chamber 32, so that the absorption balls in the cavity 11 of the tank body 1 are discharged in sequence through the first ball dropping hole, the second ball dropping hole, the second chamber 32 and the ball dropping port 12.

[0045] Therefore, the high temperature gas-cooled reactor ball drop driving device of the embodiment of the present invention can ensure the communication between the first ball drop hole, the second ball drop hole and the ball drop port 12 without braking force, thereby preventing the absorption balls from accumulating in the tank body 1.

[0046] like Figure 1As shown, the tank body 1 further includes a ball return port 13, which penetrates the peripheral wall of the tank body 1 and is located at an end of the tank body 1 away from the ball drop port 12, so that the absorption ball enters the cavity 11 through the ball return port 13. In other words, the absorption ball enters the cavity 11 of the tank body 1 through the ball return port 13. Since the ball return port 13 is a certain distance away from the ball drop port 12, the absorption ball will produce a certain impact when it falls into the cavity 11, which is conducive to breaking up the compacted absorption ball.

[0047] In some embodiments, the high-temperature gas-cooled reactor ball-dropping drive device of an embodiment of the present invention further includes a passive drive component 4, which is provided on the tank body 1 and connected to the second end of the ball-dropping rod 3. The passive drive component 4 is used to drive the ball-dropping rod 3 to move between a first position and a second position. In the first position, the passive drive component 4 is movable under the action of gravity.

[0048] It can be understood that the passive driving member 4 can move under the action of gravity, including movement and rotation. For example, the passive driving member 4 is a gear rack assembly, that is, the gear is connected to the ball drop rod 3, and the rack is connected to the gear through a helical gear pair. Then, when the gear is moved by gravity, the gear connected to the ball drop rod 3 can be driven to rotate by the helical gear pair, thereby driving the ball drop rod 3 to rotate, so as to realize the rotation of the ball drop rod 3 between the first position and the second position.

[0049] Optionally, the passive driving member 4 is rotatable around the first axis, and the passive driving member 4 also includes a counterweight 41. There is a gap between the center of gravity of the passive driving member 4 and the first axis. In the first position, there is an angle between the extension direction of the line connecting the center of gravity of the passive driving member 4 and the first axis and the direction of gravity, wherein the first axis is orthogonal to the axis of the tank body 1.

[0050] Preferably, the ball drop rod 3 includes a first rotating portion 33, which is provided at the second end of the ball drop rod 3. The first rotating portion 33 is used to connect with the passive driving member 4 so that the passive driving member 4 drives the ball drop rod 3 to rotate between the first position and the second position.

[0051] Specifically, if Figure 1 As shown, the passive driving member 4 is a gear, and a counterweight 41 is mounted on the gear with a gap between the counterweight 41 and the gear's rotation axis. The first rotating portion 33 is a gear meshing with the passive driving member 4, and the rotation axis of the passive driving member 4 is orthogonal to the rotation axis of the ball dropper 3.

[0052] It can be understood that there is an angle between the center of gravity of the passive driving member 4 and the extension direction of the line connecting the first axis and the up-down direction. Then, the passive driving member 4 can rotate under the action of gravity, thereby driving the ball drop rod 3 to rotate from the first position to the second position, so that the angle between the center of gravity of the passive driving member 4 and the extension direction of the line connecting the first axis and the up-down direction is 0 degrees.

[0053] In addition, the passive driving member 4 can also be an incomplete gear. For example, the passive driving member 4 is a half gear meshing with the first rotating part 33. Then, the passive driving member 4 rotates under the action of gravity, which can drive the first rotating part 33 to rotate.

[0054] In some embodiments, the high temperature gas-cooled reactor ball drop drive device further includes a first drive member 5, which includes a first output portion 51, and the first output portion 51 is connected to the first rotating portion 33. The first drive member 5 is started to drive the ball drop rod 3 to rotate between the first position and the second position.

[0055] It is understandable that if Figure 1 As shown, the first driving member 5 can be a motor, and the first output part 51 is an output shaft. The first output shaft is provided with a gear engaged with the first rotating part 33, so that the first driving member 5 is started to drive the ball dropping rod 3 to rotate.

[0056] That is, the first driving member 5 is a motor that can rotate back and forth, thereby driving the ball-dropping rod 3 to rotate between the first position and the second position.

[0057] It should be noted that the reciprocating rotation frequency of the first driving member 5 can control the rate at which the absorption balls are discharged from the ball dropping port 12, that is, when the ball dropping rod 3 is in the first position, the blocking portion 31 blocks the first ball dropping hole, and the absorption balls in the tank body 1 cannot be discharged from the ball dropping port 12; when the ball dropping rod 3 is in the second position, the absorption balls can be discharged through the first ball dropping hole, the second ball dropping hole, the second chamber 32 and the ball dropping port 12.

[0058] In some embodiments, the high-temperature gas-cooled reactor ball-dropping drive device of an embodiment of the present invention also includes a disturbance rod 7, which is rotatably mounted on the ball-dropping rod 3 around the axis of the tank body 1. The first end of the disturbance rod 7 is located in the cavity 11 and adjacent to the ball-dropping port 12. The second end of the disturbance rod 7 is located outside the tank body 1. The disturbance rod 7 includes a protrusion 71, which is adjacent to the first end of the disturbance rod 7 and extends toward the inner wall surface of the tank body 1.

[0059] Specifically, if Figure 1 As shown, the lower end of the disturbance rod 7 is the first end, and the upper end of the disturbance rod 7 is the second end. The rotation of the disturbance rod 7 drives the protrusion 71 to rotate, so that the protrusion 71 contacts the absorption balls in the cavity 11 of the tank body 1 and breaks up the compacted absorption balls, making it easier for the absorption balls to be discharged through the ball drop port 12.

[0060] In some embodiments, there are multiple protrusions 71, and the multiple protrusions 71 are divided into multiple groups. Each group of protrusions 71 includes at least two protrusions 71 arranged along the circumference of the disturbance rod 7, and the multiple groups of protrusions 71 are arranged at intervals along the extension direction of the disturbance rod 7.

[0061] It is understandable that if Figure 1 As shown, multiple groups of protrusions 71 are arranged on the disturbance rod 7 at intervals along the upper and lower directions. After the absorption balls are accumulated in the tank body 1, the multiple groups of protrusions 71 can more fully disturb the absorption balls, which is further conducive to destroying the compacted absorption balls, thereby further avoiding the occurrence of compaction of the absorption balls.

[0062] In some embodiments, the high-temperature gas-cooled reactor ball-dropping drive device of an embodiment of the present invention further includes a second drive member 6, which includes a second output portion 61. The second output portion 61 is connected to the second end of the disturbance rod 7. The second drive member 6 is started to drive the disturbance rod 7 to rotate.

[0063] Specifically, if Figure 1 As shown, the second driving member 6 can also be a motor, and the second output part 61 is the output shaft of the motor. The second output part 61 is provided with a first gear 62, and the disturbance rod 7 is provided with a second gear 72 engaged with the first gear 62, so that the second driving member 6 is started and the disturbance rod 7 is driven to rotate, thereby disturbing the absorption balls in the cavity 11 of the tank body 1, which can avoid the absorption balls from being compacted.

[0064] It is understandable that if Figure 1 As shown, since the disturbance rod 7 is sleeved on the peripheral wall surface of the ball-dropping rod 3 , the first rotating part 33 is arranged above the second gear 72 to avoid motion interference between the first rotating part 33 and the second gear 72 .

[0065] In some embodiments, the blocking member 2 further includes a notch opening toward the ball-dropping opening 12 . The notch is provided at one end of the blocking member 2 adjacent to the ball-dropping opening 12 , and the notch forms a first ball-dropping hole.

[0066] It can be understood that the opening of the notch is adjacent to the upper end of the ball drop port 12, so that the absorbing ball can easily enter the ball drop port 12 through the notch. That is, the notch is opened at the lower end of the blocking member 2 to prevent the absorbing ball from accumulating too much between the cavity 11 of the tank body 1 and the blocking member 2.

[0067] Preferably, there are multiple first ball-dropping holes, which are spaced apart along the circumference of the blocking member 2. In other words, the multiple first ball-dropping holes are evenly arranged along the circumference of the blocking member 2, which can speed up the discharge of the absorbed balls through the first ball-dropping holes, the first chamber and the ball-dropping port 12.

[0068] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like to indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention 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 should not be understood as limiting the present invention.

[0069] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of the technical features being referred to. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one such feature. In the description of the present invention, "plurality" means at least two, such as two, three, etc., unless otherwise specifically defined.

[0070] In the present invention, unless otherwise specified or limited, the terms "installed," "connected," "connect," "fixed," etc. should be understood in a broad sense. For example, they can refer to fixed connection, detachable connection, or integration; mechanical connection, electrical connection, or communication; direct connection or indirect connection through an intermediate medium; internal communication between two elements or interaction between two elements, unless otherwise specified. Those skilled in the art will understand the specific meanings of the above terms in the present invention based on specific circumstances.

[0071] In the present invention, unless otherwise expressly specified or limited, when a first feature is "above" or "below" a second feature, it may mean that the first and second features are in direct contact, or that the first and second features are in indirect contact through an intermediary. Furthermore, when a first feature is "above," "above," or "above" a second feature, it may mean that the first feature is directly above or diagonally above the second feature, or simply means that the first feature is at a higher level than the second feature. When a first feature is "below," "below," or "below" a second feature, it may mean that the first feature is directly below or diagonally below the second feature, or simply means that the first feature is at a lower level than the second feature.

[0072] In the present invention, the terms "one embodiment", "some embodiments", "examples", "specific examples", or "some examples" mean that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present invention. In this specification, the schematic expressions of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any one or more embodiments or examples in a suitable manner. In addition, those skilled in the art can combine and combine different embodiments or examples described in this specification and the features of different embodiments or examples without contradiction.

[0073] Although the above embodiments have been shown and described, it is understood that the above embodiments are illustrative and are not to be construed as limitations on the present invention. Changes, modifications, substitutions and variations of the above embodiments by those skilled in the art are all within the scope of protection of the present invention.

Claims

1. A high temperature gas-cooled reactor ball drop drive device, characterized in that: include: A tank body, the tank body comprising a cavity and a ball drop port, the ball drop port being provided at the bottom of the tank body and communicating with the cavity; a blocking member disposed in the cavity and having a first chamber with an opening at a lower end, wherein the opening of the first chamber is in communication with the ball drop port, and a first ball drop hole is provided on a peripheral wall of the blocking member, wherein the first ball drop hole is in communication with the cavity and the first chamber, so that the absorption balls in the cavity are discharged to the ball drop port through the first ball drop hole; A ball drop rod is connected to the tank body and is rotatable around the axis of the tank body between a first position and a second position. The first end of the ball drop rod is placed in the cavity, and the second end of the ball drop rod is located outside the tank body. The ball drop rod includes a blocking portion, the blocking portion is located in the first cavity and connected to the first end of the ball drop rod, the blocking portion has a second cavity with an opening at the lower end, the opening of the second cavity is connected to the ball drop port, and a second ball drop hole is provided on the peripheral wall of the blocking portion, the second ball drop hole is connected to the second cavity, In the first position, the peripheral wall of the blocking portion is used to block the first ball-dropping hole, so as to block the first ball-dropping hole and the ball-dropping opening; In the second position, the second ball-dropping hole is connected to the first ball-dropping hole and the second chamber, so that the absorption balls in the cavity are discharged from the tank body through the first ball-dropping hole, the second ball-dropping hole, the second chamber and the ball-dropping port in sequence; It also includes a passive driving member, which is arranged on the tank body and connected to the second end of the ball drop rod. The passive driving member is used to drive the ball drop rod to move between the first position and the second position. In the first position, the passive driving member is movable under the action of gravity.

2. The high temperature gas-cooled reactor falling ball driving device according to claim 1, characterized in that: The passive driving member is rotatable around a first axis, and the passive driving member also includes a counterweight. There is a gap between the center of gravity of the passive driving member and the first axis. In the first position, there is an angle between the extension direction of the line connecting the center of gravity of the passive driving member and the first axis and the direction of gravity, wherein the first axis is orthogonal to the axis of the tank body.

3. The high temperature gas-cooled reactor falling ball driving device according to claim 2, characterized in that: The ball drop rod includes a first rotating portion, which is provided at the second end of the ball drop rod. The first rotating portion is used to be connected to the passive driving member so that the passive driving member drives the ball drop rod to rotate between the first position and the second position.

4. The high temperature gas-cooled reactor falling ball driving device according to claim 3, characterized in that: The high-temperature gas-cooled reactor ball drop drive device also includes a first drive member, which includes a first output portion connected to the first rotating portion. The first drive member is activated to drive the ball drop rod to rotate between the first position and the second position.

5. The high temperature gas-cooled reactor falling ball driving device according to claim 3, characterized in that: It also includes a disturbance rod, which is rotatably mounted on the ball dropping rod around the axis of the tank body. The first end of the disturbance rod is located in the cavity and adjacent to the ball dropping port, and the second end of the disturbance rod is located outside the tank body. The disturbance rod includes a protrusion, which is adjacent to the first end of the disturbance rod and extends toward the inner wall of the tank body.

6. The high temperature gas-cooled reactor falling ball driving device according to claim 5, characterized in that: There are multiple protrusions, and the multiple protrusions are divided into multiple groups. Each group of protrusions includes at least two protrusions arranged along the circumference of the disturbance rod. The multiple groups of protrusions are arranged at intervals along the extension direction of the disturbance rod.

7. The high temperature gas-cooled reactor falling ball driving device according to claim 6, characterized in that: It also includes a second driving member, which includes a second output portion. The second output portion is connected to the second end of the disturbance rod. The second driving member is started to drive the disturbance rod to rotate.

8. The high temperature gas-cooled reactor falling ball driving device according to claim 1, characterized in that: The blocking member further includes a notch opening toward the ball-dropping opening. The notch is provided at one end of the blocking member adjacent to the ball-dropping opening, and the notch forms the first ball-dropping hole.

9. The high temperature gas-cooled reactor falling ball driving device according to claim 7, characterized in that: There are a plurality of the first ball-dropping holes, and the plurality of the first ball-dropping holes are arranged at intervals along the circumference of the blocking member.

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