A base for a mobile radiotherapy apparatus and a method of using the same

Abstract

The application discloses a base of mobile radiotherapy equipment and a use method thereof, and relates to the field of radiotherapy equipment. The base comprises a mobile chassis, a stabilizing device and a beam blocking device; the use method comprises the following steps: 1, moving out the base and transporting to a use position; 2, unfolding and fixing the base; 3, establishing a plane two-dimensional rectangular coordinate system; 4, projecting and leveling in the plane x-axis direction; 5, projecting and leveling in the plane y-axis direction; 6, judging whether the plane is leveled; 7, projecting in the plane x-axis direction; 8, projecting in the plane y-axis direction; 9, repeatedly performing steps 7 and 8 until the plane is leveled. The stabilizing device is small in size and can easily realize the movement of the radiotherapy equipment; when working, the supporting legs of the stabilizing device are opened, the gravity center range is increased, the stability and the stable range are increased, and furthermore, the descending height of the ground foot support in the parking module is controlled according to the ground of the working environment through an electronic gyroscope, so that the equipment is quickly brought to a horizontal state, and the stability of the equipment is ensured again.

Description

TECHNICAL FIELD

[0001] The application belongs to the technical field of bases of radiotherapy equipment, and particularly relates to a base of mobile radiotherapy equipment and a use method thereof. BACKGROUND

[0002] The base of the existing radiotherapy equipment is large in size, which causes inconvenience to the mobile radiotherapy equipment, and the base of the existing radiotherapy equipment is provided with rollers below, so that the base can be moved, but when the radiotherapy equipment is working, the rollers serve as supporting points, and it is inconvenient to position the radiotherapy equipment, and displacement may occur, which affects normal work. Meanwhile, the range of the center of gravity of the base is small, and it is inconvenient to quickly adjust the position of the treatment equipment to a treatment state. SUMMARY

[0003] The application aims to solve the technical problems in the prior art, and provides a base of mobile radiotherapy equipment, which is novel and reasonable in design. When the base is stored and transported, the stabilizing device and the beam blocking device are retracted to the initial state, so that the size of the equipment is minimized, and the movement of the radiotherapy equipment can be easily realized. When the base is in a treatment preparation state and a treatment state, the stabilizing device is unfolded to the working state and is locked, and the beam blocking device is moved to the working state, so that the treatment state can be entered. When the base is in the working state, the supporting legs of the stabilizing device are opened, so that the stability and the stability range of the base are increased, and the range of the center of gravity of the equipment is increased, thereby facilitating the use.

[0004] To solve the above technical problems, the application adopts the following technical scheme: a base of mobile radiotherapy equipment, characterized in that the base comprises

[0005] A mobile chassis is used for the movement and support of the entire equipment.

[0006] A stabilizing device is used for the support, fixation and leveling of the entire equipment during use.

[0007] A beam blocking device is used for shielding treatment rays.

[0008] The base of mobile radiotherapy equipment is characterized in that the mobile chassis comprises a supporting seat, a trolley arranged at the rear side of the supporting seat, and supporting beams one and two arranged at the two sides of the supporting seat and equal in length. The rear ends of the supporting beams one and two are flush with the rear end of the supporting seat. The length of the supporting beam one is greater than the length of the supporting seat. The bottom ends of the supporting beams one and two are both provided with rollers. The front side of the supporting seat is provided with a gyroscope.

[0009] The base of the mobile radiotherapy device has the characteristics that the stabilizing device comprises a front support leg 1 slidably mounted on the outer side wall of the support beam 1, a front support leg 2 slidably mounted on the outer side wall of the support beam 2, a rear support leg 1 hinged at the rear end of the outer side wall of the support beam 1, and a rear support leg 2 hinged at the rear end of the outer side wall of the support beam 2, the parking module 1 is arranged on the rear support leg 1, the parking module 2 is arranged on the front support leg 1, the parking module 3 is arranged on the front support leg 2, and the parking module 4 is arranged on the rear support leg 2.

[0010] The base of the mobile radiotherapy device has the characteristics that the parking module 1, the parking module 2, the parking module 3 and the parking module 4 are all electrically supported.

[0011] The base of the mobile radiotherapy device has the characteristics that the rotation angle of the rear support leg 1 and the support beam 1 is 0°-90°, the rotation angle of the rear support leg 2 and the support beam 2 is 0°-90°, the sum of the lengths of the rear support leg 1 and the front support leg 1 is equal to the length of the support beam 1, and the sum of the lengths of the rear support leg 2 and the front support leg 2 is equal to the length of the support beam 2.

[0012] The base of the mobile radiotherapy device has the characteristics that the beam blocking device comprises a movable base slidably arranged along the front wall of the support base and having a telescopic structure, a movable platform for mounting a beam stopper is arranged on the upper part of the end of the movable base away from the support base, a plurality of universal wheels are arranged on the lower part of the end of the movable base away from the support base, and the beam stopper is a heavy metal block with uniform thickness.

[0013] Meanwhile, the application also discloses a use method of the base of the mobile radiotherapy device, which is simple in method steps and reasonable in design, and has the characteristics that the use method comprises the following steps:

[0014] Step 1: moving out the base and transporting to the use position: moving out the base in the storage state from the storage position and transporting to the use position;

[0015] The storage state of the base refers to that the four support legs are retracted to the side walls of the two support beams, the beam blocking device is retracted close to the support base, and the four parking modules are in the locked state;

[0016] The transportation state of the base refers to that the four parking modules are in the unlocked state, and the rest is consistent with the storage state;

[0017] The four parking modules of the base are unlocked in the storage position, and the base in the transportation state is pushed, at this time, the rollers and the universal wheels are in contact with the ground, the trolley is pushed to make the base move to the use position;

[0018] Step two, the unfolding and fixing of the base: during the preparation of the radiotherapy equipment, the rear support leg one and the rear support leg two are opened by 90 degrees, the front support leg one and the front support leg two are slid out, the four parking modules are controlled to be in the locked state, the parking module one, the parking module two, the parking module three and the parking module four are all electrically supported, the electrically supported simultaneously descends to make the movable chassis rise until the rollers and the universal wheels are off the ground;

[0019] Step three, the establishment of the two-dimensional rectangular coordinate system: taking the position of the gyroscope as the origin o, the connecting line of the central axes of the rear support leg one and the rear support leg two as the x axis, and the straight line perpendicular to the x axis and passing through the o point as the y axis;

[0020] Step four, the two-dimensional plane where the gyroscope is located is projected to the positive direction of the x axis, from the projection direction, the plane projection is regarded as the first straight line, according to the position relationship between the four electrically supported and the gyroscope on the plane, the projection point positions of the gyroscope and the four electrically supported are determined on the first straight line, the projection point position of the highest projection point position of the four electrically supported is kept unchanged, and the projection point heights of the other three electrically supported are corrected to the projection point position of the highest projection point position;

[0021] Step five, the two-dimensional plane where the gyroscope is located is projected to the positive direction of the y axis again, from the projection direction, the plane projection is regarded as the second straight line, according to the position relationship between the four electrically supported and the gyroscope on the plane, the projection point positions of the gyroscope and the four electrically supported are determined on the second straight line, the projection point position of the highest projection point position of the four electrically supported is kept unchanged, and the projection point heights of the other three electrically supported are corrected to the projection point position of the highest projection point position;

[0022] Step six, judging whether the two-dimensional plane where the gyroscope is located is leveled: checking the current display data of the gyroscope, judging whether the two-dimensional plane where the gyroscope is located is horizontal, when the two-dimensional plane where the gyroscope is located is horizontal, the support seat is adjusted to be horizontal; when the two-dimensional plane where the gyroscope is located is not adjusted to be horizontal, step seven is executed;

[0023] Step seven, the two-dimensional plane where the gyroscope is located is projected to the positive direction of the x axis, from the projection direction, the plane projection is regarded as the first straight line, according to the position relationship between the four electrically supported and the gyroscope on the plane, the projection point positions of the gyroscope and the four electrically supported are determined on the first straight line, the projection point position of the gyroscope is kept unchanged, and the projection point heights of the four electrically supported are simultaneously corrected to the projection point position of the gyroscope;

[0024] Step eight, the two-dimensional plane where the gyroscope is located is projected to the positive direction of the y-axis, and the plane projection is regarded as a second straight line from the projection direction, the projection point positions of the gyroscope and the four motorized foot supports are determined on the second straight line according to the positional relationship between the four motorized foot supports and the gyroscope, the projection point positions of the four motorized foot supports are simultaneously corrected to the projection point position of the gyroscope while keeping the projection point position of the gyroscope unchanged;

[0025] Step nine, judging whether the two-dimensional plane where the gyroscope is located is leveled: checking the current display data of the gyroscope, judging whether the two-dimensional plane where the gyroscope is located is horizontal, when the two-dimensional plane where the gyroscope is located is horizontal, the support seat is adjusted to be horizontal, and when the two-dimensional plane where the gyroscope is located is not adjusted to be horizontal, step seven is continuously executed.

[0026] Compared with the prior art, the present application has the following advantages:

[0027] 1、The volume of the base during transportation is very small, so that the movement of the radiotherapy equipment can be easily realized; the opening of the support legs on the base increases the stability and the stability range of the base, so that the range of the center of gravity of the equipment is increased; the parking module is installed on the base, which is stable and reliable, and is convenient to use.

[0028] 2、The base adopted in the present application has three states: storage state: the four support legs are retracted into the two support beams and are in the initial position, the beam blocking device is retracted close to the fixed rack, and the parking device is in the locked state; transportation state: the parking device is in the unlocked state, and the rest is consistent with the storage state; working state: when the radiotherapy equipment is preparing for treatment, the rear support leg is opened by 90 degrees, and the front support leg is stretched out, then the electronic gyroscope is used to control the descent height of the foot support in the parking module, so that the equipment can quickly be in a horizontal state, and the beam blocking device is moved forward to be away from the fixed rack, and the use effect is good.

[0029] 3、The use method adopted in the present application is simple, the descent height of the foot support of the parking module is controlled through the electronic gyroscope, so that the equipment can quickly be in a horizontal state, and therefore the stability of the radiotherapy equipment is ensured, and the use is convenient.

[0030] In summary, the application is novel and reasonable, the stable device is installed on the base, in the transfer state, the volume of the base is small, and the movement of the radiotherapy equipment can be easily realized; in the working state, the supporting legs of the stable device are opened, and thus the stability and the stable range of the base are increased, so that the range of the equipment gravity center is increased; the parking module is installed on the base, the foot support on the parking module is used for supporting the radiotherapy equipment, compared with the roller support, the equipment will not be displaced, the stability is increased, and in addition, the descending height of the foot support in the parking module is controlled according to the ground of the working environment through the electronic gyroscope, the descending height makes the equipment quickly in the horizontal state, and the stability of the equipment is ensured again, so that the application is convenient to use and popularize.

[0031] The technical scheme of the application is further described in detail below with reference to the drawings and embodiments. BRIEF DESCRIPTION OF DRAWINGS

[0032] Figure 1 It is a working state schematic view of the base structure of the application after expansion.

[0033] Figure 2 It is a storage and transfer state schematic view of the base structure of the application after retraction.

[0034] Figure 3 It is a top view of the application in the working state. Figure 2

[0035] Figure 4 It is a schematic view of the distribution relationship of the four supporting positions and the gyroscope position of the application.

[0036] Figure 5 It is a schematic view of the projection effect along the x direction. Figure 4

[0037] Figure 6 It is a schematic view of the projection effect along the y direction. Figure 4

[0038] It is a flow chart of the use method of the application. Figure 7 BRIEF DESCRIPTION OF DRAWINGS

[0039] 11 - trolley; 12 - support seat; 13 - support beam two;

[0040] 14 - support beam one; 15 - roller; 21 - rear supporting leg one;

[0041] 22 - parking module one; 23 - front supporting leg one; 24 - parking module two;

[0042] 25 - parking module three; 26 - front supporting leg two; 27 - parking module four;

[0043] 25 - parking module three; 26 - front supporting leg two; 27 - parking module four;

[0044] ​​28—Second rear support leg; 31—Sports base; 32—Sports platform;

[0045] 33—Binding device; 34—Wheel. Detailed Implementation

[0046] like Figures 1 to 3 As shown, the base of a mobile radiotherapy device according to the present invention includes a mobile chassis for moving and supporting the entire device;

[0047] Stabilizing devices: used for supporting, fixing, and leveling the entire equipment during use;

[0048] Beam blocking device: Used to shield therapeutic radiation.

[0049] In this embodiment, the mobile chassis includes a support base 12, a trolley 11 disposed on the rear side of the support base 12, and support beams 14 and 13 of equal length disposed on both sides of the support base 12. The rear ends of support beam 14 and support beam 13 are flush with the rear end of the support base 12. The length of support beam 14 is greater than the length of the support base 12. Rollers 15 are installed at both ends of the bottom of support beam 14 and support beam 13. A gyroscope is installed in the middle of the front side of the support base 12.

[0050] In this embodiment, the stabilizing device includes a front support leg 23 slidably mounted on the outer wall of the support beam 14, a front support leg 26 slidably mounted on the outer wall of the support beam 23, a rear support leg 21 hinged to the rear end of the outer wall of the support beam 14, and a rear support leg 28 hinged to the rear end of the outer wall of the support beam 23. A parking module 22 is provided on the rear support leg 21, a parking module 24 is provided on the front support leg 23, a parking module 35 is provided on the front support leg 26, and a parking module 47 is provided on the rear support leg 28.

[0051] In this embodiment, parking module 1 22, parking module 24, parking module 3 25 and parking module 4 27 are all electric foot supports.

[0052] In this embodiment, the rotation angle between the rear support leg 21 and the support beam 14 is 0° to 90°, the rotation angle between the rear support leg 28 and the support beam 13 is 0° to 90°, the sum of the lengths of the rear support leg 21 and the front support leg 23 is equal to the length of the support beam 14, and the sum of the lengths of the rear support leg 28 and the front support leg 26 is equal to the length of the support beam 13.

[0053] In this embodiment, the beam blocking device includes a movable base 31 that is slidably disposed along the front wall of the support base 12 and has a telescopic structure. A movable platform 32 for installing a beam blocker 33 is disposed on the upper part of the end of the movable base 31 away from the support base 12. A plurality of universal wheels 34 are disposed on the lower part of the end of the movable base 31 away from the support base 12. The beam blocker 33 is a heavy metal block of uniform thickness.

[0054] It should be noted that the base's small size during transport allows for easy movement of the radiotherapy equipment. The extended support legs increase the base's stability and range, thus widening the equipment's center of gravity. A parking module is installed on the base for added stability and reliability. The base has three states: Storage state: all four support legs are retracted into the two support beams in their initial position, the beam blocking device is retracted close to the fixed frame, and the parking device is locked. Transport state: the parking device is released, and everything else remains the same as in the storage state. Working state: during radiotherapy preparation, the rear support leg opens 90 degrees, the front support leg extends, and then, via an electronic gyroscope, the descent height of the foot support in the parking module is controlled to ensure the equipment quickly reaches a horizontal position. The beam blocking device moves forward away from the fixed frame, resulting in good performance.

[0055] like Figures 4 to 7 The method of using the base of a mobile radiotherapy device shown includes the following steps:

[0056] Step 1: Remove the base and transport it to the usage location: Remove the base from its storage location and transport it to the usage location;

[0057] The storage state of the base refers to the four support legs being retracted to the side walls of the two support beams, the beam blocking device being retracted close to the support base 12, and the four parking modules being in a locked state.

[0058] The transport status of the base refers to the four parking modules being in the released state, while the rest remain the same as the storage state;

[0059] Release the four parking modules of the base in the storage position, push the base in the transfer state, at this time, the roller 15 and the caster wheel 34 touch the ground, push the trolley 11 to drive the base to the use position;

[0060] Step 2, Deployment and Fixation of the Base: During the radiotherapy equipment preparation work, the rear support leg 1 21 and rear support leg 2 28 open 90 degrees, and the front support leg 1 23 and front support leg 2 26 slide out, controlling the four parking modules to be in a locked state. The parking module 1 22, parking module 24, parking module 3 25 and parking module 4 27 are all electric foot supports. The electric foot supports lower at the same time to raise the mobile chassis until the roller 15 and the caster wheel 34 are off the ground.

[0061] Step three, establish a two-dimensional rectangular coordinate system: with the gyroscope position as the origin o, parallel to the connecting line of the middle axes of the rear support leg one 21 and the rear support leg two 28 as the x-axis, and the straight line perpendicular to the x-axis and passing through the o point as the y-axis;

[0062] Step four, project the two-dimensional plane where the gyroscope is located to the positive direction of the x-axis. From the projection direction, the plane projection is regarded as the first straight line. According to the position relationship between the four electrically driven foot supports and the gyroscope on the plane, the projection point positions of the gyroscope and the four electrically driven foot supports are determined on the first straight line. The projection point position of the highest projection point among the four electrically driven foot supports is kept unchanged, and the projection point heights of the other three electrically driven foot supports are corrected to the projection point position of the highest projection point.

[0063] Step five, project the two-dimensional plane where the gyroscope is located to the positive direction of the y-axis. From the projection direction, the plane projection is regarded as the second straight line. According to the position relationship between the four electrically driven foot supports and the gyroscope on the plane, the projection point positions of the gyroscope and the four electrically driven foot supports are determined on the second straight line. The projection point position of the highest projection point among the four electrically driven foot supports is kept unchanged, and the projection point heights of the other three electrically driven foot supports are corrected to the projection point position of the highest projection point.

[0064] Step six, judge whether the two-dimensional plane where the gyroscope is located is flat: check the current display data of the gyroscope to judge whether the two-dimensional plane where the gyroscope is located is horizontal. When the two-dimensional plane where the gyroscope is located is horizontal, the support seat 12 is adjusted to be horizontal. When the two-dimensional plane where the gyroscope is located is not adjusted to be horizontal, step seven is executed.

[0065] Step seven, project the two-dimensional plane where the gyroscope is located to the positive direction of the x-axis. From the projection direction, the plane projection is regarded as the first straight line. According to the position relationship between the four electrically driven foot supports and the gyroscope on the plane, the projection point positions of the gyroscope and the four electrically driven foot supports are determined on the first straight line. The projection point position of the gyroscope is kept unchanged, and the projection point heights of the four electrically driven foot supports are simultaneously corrected to the projection point position of the gyroscope.

[0066] Step eight, project the two-dimensional plane where the gyroscope is located to the positive direction of the y-axis. From the projection direction, the plane projection is regarded as the second straight line. According to the position relationship between the four electrically driven foot supports and the gyroscope on the plane, the projection point positions of the gyroscope and the four electrically driven foot supports are determined on the second straight line. The projection point position of the gyroscope is kept unchanged, and the projection point heights of the four electrically driven foot supports are simultaneously corrected to the projection point position of the gyroscope.

[0067] Step nine, judging whether the two-dimensional plane where the gyroscope is located is leveled: checking the current display data of the gyroscope, judging whether the two-dimensional plane where the gyroscope is located is leveled, when the two-dimensional plane where the gyroscope is located is leveled, the support base 12 is adjusted to be leveled; when the two-dimensional plane where the gyroscope is located is not leveled, step seven is continuously executed.

[0068] In this embodiment, as shown in the figure, the electrically powered foot support on the parking module two 24 is regarded as electrically powered foot support A, the electrically powered foot support on the parking module three 25 is regarded as electrically powered foot support B, the electrically powered foot support on the parking module four 27 is regarded as electrically powered foot support C, and the electrically powered foot support on the parking module one 22 is regarded as electrically powered foot support D, and the position of the gyroscope is the origin o. Figure 4 As shown in the figure, the operation process of step four is: the two-dimensional plane where the gyroscope is located is projected to the positive direction of the x axis, from the projection direction, the plane projection is regarded as the first straight line B(A)-C(D), according to the position relationship between the four electrically powered foot supports and the gyroscope on the plane, the projection point positions of the gyroscope and the four electrically powered foot supports are determined on the first straight line, the projection point position of the highest projection point of the four electrically powered foot supports is kept unchanged, at this time, the highest projection point has two, which are C point and D point, at this time, the moving distance of A point is: (R5+R8)sinθ1;

[0069] Figure 5 The moving distance of B point is: (R6+R7)sinθ1;

[0070] As shown in the figure, the operation process of step five is: the two-dimensional plane where the gyroscope is located is projected to the positive direction of the y axis again, from the projection direction, the plane projection is regarded as the second straight line CBAD, according to the position relationship between the four electrically powered foot supports and the gyroscope on the plane, the projection point positions of the gyroscope and the four electrically powered foot supports are determined on the second straight line, the position of the highest projection point D of the four electrically powered foot supports is kept unchanged, and the projection point heights of the other three electrically powered foot supports are corrected to the position of the highest projection point;

[0071] The moving distance of A point is: (R4-R1)sinθ2; Figure 6 The moving distance of B point is: (R2+R4)sinθ2;

[0072] The moving distance of C point is: (R3+R4)sinθ2;

[0073] As shown in the figure, the operation process of step six is: the two-dimensional plane where the gyroscope is located is projected to the positive direction of the x axis again, from the projection direction, the plane projection is regarded as the third straight line B(A)-C(D), according to the position relationship between the four electrically powered foot supports and the gyroscope on the plane, the projection point positions of the gyroscope and the four electrically powered foot supports are determined on the third straight line, the projection point position of the highest projection point of the four electrically powered foot supports is kept unchanged, at this time, the highest projection point has two, which are C point and D point, at this time, the moving distance of A point is: (R5+R8)sinθ3;

[0074] The moving distance of B point is: (R6+R7)sinθ3;

[0075] Figure 5 ​​As shown, the operation process of step seven is as follows: the two-dimensional plane where the gyroscope is located is projected onto the positive x-axis. From the projection direction, the plane projection is regarded as the first straight line B(A)-C(D). According to the positional relationship between the four electric foot supports on the plane and the gyroscope, the projection point positions of the gyroscope and the four electric foot supports are determined on the first straight line. Keeping the projection point position of the gyroscope unchanged, the projection point heights of the four electric foot supports are simultaneously corrected to the projection point position of the gyroscope.

[0076] The distance point A moves is: R5sinθ1;

[0077] The distance point B moves is: R6sinθ1;

[0078] The distance point C moves is: R7sinθ1;

[0079] The distance point D moves is: R8sinθ1;

[0080] like Figure 6 As shown, the operation process of step eight is as follows: Project the two-dimensional plane where the gyroscope is located onto the positive y-axis. Looking from the projection direction, the plane projection is regarded as the second straight line CBAD. Based on the positional relationship between the four electric foot supports and the gyroscope on the plane, determine the projection point position of the gyroscope and the four electric foot supports on the second straight line. Keep the projection point position of the gyroscope unchanged, and simultaneously correct the projection point height of the four electric foot supports to the projection point position of the gyroscope.

[0081] The distance point A moves is: R1sinθ2;

[0082] The distance that point B moves is: R²sinθ²;

[0083] The distance point C moves is: R3sinθ2;

[0084] The distance point D moves is: R4sinθ2;

[0085] Where R1 is the distance from point A to the y-axis; R2 is the distance from point B to the y-axis; R3 is the distance from point C to the y-axis; R4 is the distance from point D to the y-axis; R5 is the distance from point A to the x-axis; R6 is the distance from point B to the x-axis; R7 is the distance from point C to the x-axis; R8 is the distance from point D to the x-axis; θ1 is the angle between the first line B(A)-C(D) and the horizontal line; θ2 is the angle between the second line CBAD and the horizontal line.

[0086] The invention is simple to use. By using an electronic gyroscope to control the descent height of the parking module's foot support, the equipment can be quickly brought to a horizontal position, thus ensuring the stability of the radiotherapy equipment.

[0087] The above is only the preferred embodiment of the present application, and does not limit the present application, and any simple modification, change and equivalent structure change of the above embodiment according to the technical essence of the present application are still within the protection scope of the technical scheme of the present application.

Claims

1. A base for a mobile radiotherapy apparatus, characterised in that: The mobile chassis comprises a support base (12), a trolley (11) arranged at the rear side of the support base (12), and a support beam one (14) and a support beam two (13) arranged at both sides of the support base (12) and having the same length, the rear ends of the support beam one (14) and the support beam two (13) are flush with the rear end of the support base (12), the length of the support beam one (14) is greater than the length of the support base (12), the bottom ends of the support beam one (14) and the support beam two (13) are both provided with rollers (15), and the middle part of the front side of the support base (12) is provided with a gyroscope. The stabilizing device comprises a front support leg one (23) slidingly arranged on the outer side wall of the support beam one (14), a front support leg two (26) slidingly arranged on the outer side wall of the support beam two (13), a rear support leg one (21) hingedly arranged at the rear end of the outer side wall of the support beam one (14), and a rear support leg two (28) hingedly arranged at the rear end of the outer side wall of the support beam two (13), the rear support leg one (21) is provided with a parking module one (22), the front support leg one (23) is provided with a parking module two (24), the front support leg two (26) is provided with a parking module three (25), and the rear support leg two (28) is provided with a parking module four (27). The rotation angle of the rear support leg one (21) and the support beam one (14) is 0°-90°, the rotation angle of the rear support leg two (28) and the support beam two (13) is 0°-90°, the sum of the lengths of the rear support leg one (21) and the front support leg one (23) is equal to the length of the support beam one (14), and the sum of the lengths of the rear support leg two (28) and the front support leg two (26) is equal to the length of the support beam two (13). The beam blocking device comprises a moving base (31) slidingly arranged along the front wall of the support base (12) and having a telescopic structure, a moving platform (32) for mounting a beam stopper (33) is arranged at the upper part of the end of the moving base (31) away from the support base (12), a plurality of universal wheels (34) are arranged at the lower part of the end of the moving base (31) away from the support base (12), and the beam stopper (33) is a heavy metal block with uniform thickness. The use method of the base of the mobile radiotherapy device comprises the following steps: Step one, moving out the base and transporting to the use position: moving out the base in the storage state from the storage position and transporting to the use position; The storage state of the base means that the four support legs are retracted to the side walls of the two support beams, the beam blocking device is retracted close to the support base (12), and the four parking modules are in the locked state; The transportation state of the base means that the four parking modules are in the unlocked state, and the rest remains the same as the storage state; In the storage position, the four parking modules of the base are unlocked, and the base in the transportation state is pushed, at this time, the rollers (15) and the universal wheels (34) are grounded, the trolley (11) is pushed to make the base drive to the use position; ​ ​ ​ ​ Step two, the base of the development and fixed: radiotherapy equipment treatment preparation, the back support leg one (21) and the back support leg two (28) open 90 degrees, the front support leg one (23) and the front support leg two (26) slip out, control four parking module is in the lock state, the parking module one (22), the parking module two (24), the parking module three (25) and the parking module four (27) are electric ground support, electric ground support drops at the same time makes the mobile chassis rise, until the roller (15) and universal wheel (34) off the ground; Step three, establish a two-dimensional Cartesian coordinate system: with the gyroscope position as the origin o, parallel to the back support leg one (21) and the back support leg two (28) of the central axis line as the x axis, and the straight line perpendicular to the x axis and passing through the o point as the y axis; Step four, the two-dimensional plane where the gyroscope is projected to the positive direction of the x axis. From the projection direction, the plane projection is regarded as the first straight line. According to the position relationship between the four electric ground supports and the gyroscope on the plane, the projection point positions of the gyroscope and the four electric ground supports are determined on the first straight line. The projection point position of the highest projection point among the four electric ground supports is kept unchanged, and the projection point heights of the other three electric ground supports are corrected to the projection point position of the highest projection point. Step five, the two-dimensional plane where the gyroscope is projected to the positive direction of the y axis. From the projection direction, the plane projection is regarded as the second straight line. According to the position relationship between the four electric ground supports and the gyroscope on the plane, the projection point positions of the gyroscope and the four electric ground supports are determined on the second straight line. The projection point position of the highest projection point among the four electric ground supports is kept unchanged, and the projection point heights of the other three electric ground supports are corrected to the projection point position of the highest projection point. Step six, whether the two-dimensional plane where the gyroscope is located is flat: check the current display data of the gyroscope, and judge whether the two-dimensional plane where the gyroscope is located is horizontal. When the two-dimensional plane where the gyroscope is located is horizontal, the support seat (12) is adjusted to be horizontal; when the two-dimensional plane where the gyroscope is located is not adjusted to be horizontal, step seven is executed. Step seven, the two-dimensional plane where the gyroscope is projected to the positive direction of the x axis. From the projection direction, the plane projection is regarded as the first straight line. According to the position relationship between the four electric ground supports and the gyroscope on the plane, the projection point positions of the gyroscope and the four electric ground supports are determined on the first straight line. The projection point position of the highest projection point among the four electric ground supports is kept unchanged, and the projection point heights of the other three electric ground supports are corrected to the projection point position of the highest projection point. Step eight, the two-dimensional plane where the gyroscope is projected to the positive direction of the y axis. From the projection direction, the plane projection is regarded as the second straight line. According to the position relationship between the four electric ground supports and the gyroscope on the plane, the projection point positions of the gyroscope and the four electric ground supports are determined on the second straight line. The projection point position of the highest projection point among the four electric ground supports is kept unchanged, and the projection point heights of the other three electric ground supports are corrected to the projection point position of the highest projection point. Step nine, judging whether the two-dimensional plane where the gyroscope is located is leveled: checking the current display data of the gyroscope, judging whether the two-dimensional plane where the gyroscope is located is leveled, when the two-dimensional plane where the gyroscope is located is leveled, the support base (12) is adjusted to be leveled; when the two-dimensional plane where the gyroscope is located is not leveled, step seven is continuously executed.

2. A base for a mobile radiotherapy apparatus as claimed in claim 1, characterised in that: The parking module one (22), the parking module two (24), the parking module three (25) and the parking module four (27) are all electrically supported.

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