Spray rod assembly of a fumigation machine

Abstract

The invention discloses a spray rod assembly of a fumigator, which is arranged on a machine body and has a spray head at the upper end; the spray rod assembly comprises a first connecting assembly, a second connecting assembly and a connecting pipe; the first connecting assembly comprises a first joint whose one end is fixed to the machine body and rotates around a vertical axis; a second joint hinged on the first joint and rotates around a horizontal axis; the connecting pipe comprises a first connecting pipe interconnected with the second joint and the second connecting assembly; a second connecting pipe interconnected with the second connecting assembly and the spray head; the second connecting assembly comprises a fourth joint rotating around an axis perpendicular to the axis of the connecting pipe; the design adopts a joint combination design method, which can reduce the problems of lengthy joints and multiple bending positions caused by the dispersed joint design of multi-free spray rod assemblies; a torque balancing device is arranged at the combined joint, which can avoid the problem of difficult joint adjustment caused by large joint locking force.

Description

Technical Field

[0001] The invention belongs to the technical field of fumigation equipment, and in particular relates to a spray rod assembly of a fumigator. Background Art

[0002] Fumigation therapy is a treatment method in traditional Chinese medicine, mainly used for the treatment of mental illness, rheumatoid arthritis and other diseases. The fumigator is a product that combines existing science and technology with traditional Chinese medicine. The current fumigator mainly includes a steam generator and a steam spray rod assembly; the steam generator is mainly used to heat the liquid medicine containing Chinese medicine ingredients, vaporize the liquid medicine, and then spray the steam to the designated location through the steam spray rod assembly.

[0003] The main function of the steam spray rod assembly is to support and stabilize the nozzle to achieve the purpose of fixing the steam spraying position. The existing spray rod assembly generally includes a plurality of interconnected joints, each of which can rotate within a certain range and can be locked at any angle; support rods are designed between the joints; the support rods are hollow inside and can accommodate pipelines. For example, the Chinese patented intelligent Chinese medicine fumigator (publication number: CN205885793U) discloses a fumigation device with a full-angle joint mechanical arm, which adopts a clamp friction joint structure and uses metal precision processing. The joint has a certain damping and can stop at any angle; however, according to its disclosed technical solution, the main problem it solves is to expand the treatment range of the nozzle of the fumigator through a full-angle joint mechanical arm.

[0004] However, in practice, this full-angle joint robotic arm is not suitable for use in fumigation equipment; fumigation equipment uses hot steam to fumigate the diseased part, and steam with a certain amount of heat can achieve the therapeutic effect, but the full-angle joint robotic arm will appropriately increase the length of the entire component in order to increase the degree of freedom; as the length increases, the heat dissipation of the pipeline will also increase synchronously, which may cause the steam temperature at the steam outlet to fail to reach the therapeutic temperature, thereby reducing the therapeutic efficacy.

[0005] At the same time, according to its technical solution, there will be multiple turning joints on the full-angle joint robotic arm. The turning of the joints will increase the difficulty of condensation reflux. If the cooling water does not reflux in time, the nozzle will spray water and cause burns.

[0006] Therefore, although the spray bar assembly with multiple degrees of freedom can expand the range of motion of the treatment head, how to expand the range of motion of the spray bar assembly without affecting the condensed water return and temperature maintenance of the spray head will be an urgent problem to be solved. Summary of the invention

[0007] The invention provides a spray rod assembly for a fumigator, which has the characteristics of simple joint structure, small number of joints, and large range of motion of the treatment head; at the same time, the length of the pipeline is not increased, thus avoiding heat loss; the pipeline inside the assembly is unobstructed and will not be blocked by condensed water.

[0008] A spray bar assembly of a fumigator, the spray bar assembly is arranged on a machine body, and a spray head is arranged at the upper end thereof; the spray bar assembly comprises a first connecting assembly, a second connecting assembly, and a connecting pipe;

[0009] The first connecting assembly includes a first joint with one end of which is fixed to the machine body and rotates around a vertical axis; and a second joint hinged on the first joint and rotates around a horizontal axis;

[0010] The connecting pipe comprises a first connecting pipe interconnected with the second joint and the second connecting assembly; and a second connecting pipe interconnected with the second connecting assembly and the nozzle;

[0011] A second connection assembly includes a fourth joint rotating about an axis perpendicular to the axis of the connection pipe;

[0012] Furthermore, the first connecting assembly further comprises a third joint fixedly arranged with the second joint and with the end of the first connecting pipe; the rotation axis of the third joint is arranged perpendicularly to the rotation axis of the second joint;

[0013] Furthermore, the second connecting assembly further comprises a fifth joint fixedly arranged with the fourth joint and with the end of the second connecting pipe; the rotation axis of the fifth joint is arranged perpendicularly to the rotation axis of the fourth joint;

[0014] Further, the first joint comprises a first fixed support and a first rotating support fixed to the machine body; the first rotating support is hingedly mounted on the first fixed support via a first hinge shaft; a through hole is provided inside the first hinge shaft; and a first locking device is also included; the first locking device comprises a first rotating friction plate which is arranged in contact with the lower part of the first fixed support and is mounted on the first rotating support;

[0015] Furthermore, the first rotating friction plate is axially slidably arranged on the first hinge shaft of the first rotating support; the outer side of the first rotating friction plate is also provided with a first pressure device for providing pressure to the first rotating friction plate;

[0016] Furthermore, the two surfaces of the first rotating friction plate and the first fixed support that contact each other are smooth surfaces;

[0017] Further, the second joint comprises a second fixed support fixed to the upper part of the first joint, a second rotating support hinged to the second fixed support, and a second torque balancing device; the second fixed support comprises a fixed shield fixedly connected to the first rotating support at the upper part of the first joint and a horizontal rotating shaft fixed to the fixed shield; the second rotating support comprises two parallel supporting plates, and the second rotating support is hingedly mounted on the horizontal rotating shaft through the supporting plates; the second torque balancing device is arranged between the fixed shield and the second rotating support, and is used to provide a torque opposite to the rotation direction of the second rotating support;

[0018] Further, the second torque balancing device is a torsion spring installed on the horizontal shaft, one end of the second torque balancing device is fixed to the fixed shield, and the other end is fixed to the second rotating support;

[0019] Further, the second joint includes a second locking device; the second locking device includes a second fixed friction plate; the second fixed friction plate and the second rotating support are arranged in contact with each other, and the second fixed friction plate is slidably installed on the horizontal rotating shaft; the outer side of the second fixed friction plate is also provided with a second pressure device for providing pressure to the second fixed friction plate and the second rotating support;

[0020] Furthermore, the two surfaces of the second fixed friction plate and the second rotating support that contact each other are smooth surfaces;

[0021] Further, the third joint comprises a third fixed tube fixedly connected to the second rotating support, a through hole is provided at the fixing position of the third fixed tube and the second rotating support, a rotation limiting groove is provided in the third fixed tube, and the rotation limiting groove is used to limit the rotation angle of the first connecting tube installed in the third fixed tube;

[0022] Furthermore, the fourth joint comprises a fourth fixed support and a fourth movable support which are hinged to each other, and a fourth friction locking device is provided between the fourth fixed support and the fourth movable support;

[0023] Further, the fifth joint comprises a fifth fixed tube fixedly connected to the fourth movable support, a rotation limiting groove is provided in the fifth fixed tube, and the rotation limiting groove is used to limit the rotation angle of the second connecting tube installed in the fifth fixed tube;

[0024] Furthermore, the first pressure device and the second pressure device are disc springs.

[0025] The present invention provides a spray rod assembly of a fumigator, which is arranged on a machine body and has a spray head at the upper end; the spray rod assembly comprises a first connecting assembly, a second connecting assembly and a connecting pipe; the first connecting assembly comprises a first joint whose one end is fixed to the machine body and rotates around a vertical axis; a second joint hinged on the first joint and rotates around a horizontal axis; the connecting pipe comprises a first connecting pipe interconnected with the second joint and the second connecting assembly; a second connecting pipe interconnected with the second connecting assembly and the spray head; the second connecting assembly comprises a fourth joint rotating around an axis perpendicular to the axis of the connecting pipe; the present design adopts a joint combination design method, which can reduce the problems of lengthy joints and multiple bending positions caused by the dispersed joint design of multi-free spray rod assemblies; a torque balancing device is arranged at the combined joint, which can avoid the problem of difficult joint adjustment caused by large joint locking force. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] Figure 1 It is a front view of a spray bar assembly of a fumigator of the present invention;

[0027] Figure 2 It is a left view of a spray bar assembly of a fumigator of the present invention;

[0028] Figure 3 A front view of a spray bar assembly of a fumigator according to the present invention;

[0029] Figure 4 It is a left view of a spray bar assembly of a fumigator of the present invention;

[0030] Figure 5 It is a left view of a first adjustment mechanism of a spray bar assembly of a fumigator according to the present invention;

[0031] Figure 6 It is an AA cross-sectional view of a spray bar assembly of a fumigator of the present invention;

[0032] Figure 7 A BB cross-sectional view of a spray bar assembly of a fumigator according to the present invention;

[0033] Figure 8 A CC cross-sectional view of a spray bar assembly of a fumigator according to the present invention;

[0034] Fig. 9 The present invention is a three-dimensional view of a spray bar assembly of a fumigator. DETAILED DESCRIPTION Example

[0035] Please see attached Figure 1-9 , a spray bar assembly of a fumigator, comprising: a machine body and a spray bar assembly;

[0036] The spray bar assembly is arranged on the machine body, and a spray head 4 is arranged at the upper end thereof;

[0037] The spray bar assembly comprises a first connecting assembly 1, a second connecting assembly 2, and a connecting pipe 3;

[0038] The connecting pipe 3 includes a first connecting pipe 31 and a second connecting pipe 32;

[0039] The first connecting assembly 1 comprises a first joint 11, one end of which is fixed to the machine body and rotates around a vertical axis; a second joint 12, which is hinged on the first joint 11 and rotates around a horizontal axis;

[0040] The first connecting assembly 1 further comprises a third joint 13 fixedly arranged with the second joint 12 and with the end of the first connecting pipe 31 ; the rotation axis of the third joint 13 and the rotation axis of the second joint 12 are arranged perpendicular to each other.

[0041] The first joint 11 comprises a first fixed support 111 and a first rotating support 112 fixed to the body;

[0042] The first fixed support 111 is in an L-shaped support shape, including a vertical fixed plate 1111 arranged vertically and a horizontal fixed plate 1112 arranged horizontally;

[0043] The vertical fixing plate 1111 is provided with a through hole, and the first fixing support 111 is fixed to the machine body through the vertical fixing plate 1111, and the through hole and the pipeline outlet hole on the machine body are arranged correspondingly to each other;

[0044] The horizontal fixing plate 1112 is provided with a first rotating support hinge hole 1113;

[0045] Limit pins 1115 are provided on both sides of the first rotating support hinge hole 1113 of the horizontal fixing plate 1112;

[0046] There are two limit pins 1115, which are spaced 180 degrees apart.

[0047] A bearing 1114 is disposed in the hinge hole 1113 of the first rotating support;

[0048] The first rotating support 112 is installed in the first rotating support hinge hole 1113;

[0049] The first rotating support 112 includes a first hinge shaft 1121 and a first locking device 113;

[0050] The first hinge shaft 1121 has a through hole inside. The upper end of the first hinge shaft 1121 has an annular disc 1122.

[0051] The lower end of the first hinge shaft 1121 is hingedly mounted in the first rotating support hinge hole 1113 on the first fixed support 111, and the annular disc 1122 is arranged above the horizontal fixed plate 1112;

[0052] The bottom of the annular disc 1122 is provided with a semicircular limiting groove which cooperates with the limiting pin 1115;

[0053] The first locking device 113 includes a first fixed friction plate 1131, a first rotating friction plate 1132, and a first pressure device 1133;

[0054] The first fixed friction plate 1131 is annular and fixedly mounted on the lower surface of the horizontal fixed plate 1112 and is concentrically arranged with the first rotating support hinge hole 1113;

[0055] The first rotating friction plate 1132 is axially slidably mounted on the lower end of the first hinge shaft 1121;

[0056] The first rotating friction plate 1132 and the first fixed friction plate 1131 are arranged in contact with each other, and the contact surfaces are smooth surfaces;

[0057] The first rotating friction plate 1132 is provided with a special-shaped hole inside, which cooperates with the special-shaped shaft at the lower end of the first hinge shaft 1121, so that the first rotating friction plate 1132 cannot rotate around the first hinge shaft 1121;

[0058] The lower end of the first hinge shaft 1121 is also provided with a fixing nut;

[0059] The first pressure device 1133 is disposed between the fixing nut and the first rotating friction plate 1132;

[0060] The first pressure device 1133 is a disc spring;

[0061] The second joint 12 includes a second fixed support 121, a second rotating support 122, a second torque balancing device 123, and a second locking device 124;

[0062] The second fixed support 121 is fixedly mounted on the top of the annular disc 1122;

[0063] The second fixed support 121 includes a fixed shield 1211, a horizontal rotation shaft 1212, and a rotating shield 1213;

[0064] The fixed shield 1211 is in the shape of a circular bowl, and the bottom is fixedly connected to the top of the annular disc 1122;

[0065] The horizontal rotating shaft 1212 is in the shape of a stepped shaft, one end of which is fixedly connected to the fixed shield 1211, and the other end of which is provided with a special-shaped shaft section, and the end of the special-shaped shaft is provided with a fixing nut;

[0066] The fixed shield 1211 is also provided with a torque balancing device installation portion;

[0067] The second rotating support 122 is hingedly mounted on the horizontal rotating shaft 1212;

[0068] The second rotating support 122 includes two circular support plates 1221 arranged in parallel;

[0069] The middle of the circular support plate 1221 is provided with an axis tube 1222 which is hingedly mounted with the middle of the horizontal rotation shaft 1212;

[0070] The shaft tube 1222 and the support plate 1221 are fixedly arranged with each other;

[0071] The outer edge of the circular support plate 1221 is provided with an arc support plate, and the arc support plate is fixedly connected to the edges of the two circular support plates;

[0072] The arc support plate has a through hole on one side and an open notch 1225 on the other side;

[0073] The angle of the open notch 1225 is greater than 100 degrees and less than 150 degrees;

[0074] The second locking device 124 includes a second fixed friction plate 1241, a second rotating friction plate 1243, and a second pressure device 1242;

[0075] The second rotating friction plate 1243 is annularly fixed on the second rotating support 122;

[0076] The second fixed friction plate 1241 is slidably mounted on the horizontal rotating shaft 1212;

[0077] The second fixed friction plate 1241 is provided with a special-shaped hole inside, which cooperates with the special-shaped shaft section in the middle of the horizontal rotation shaft 1212. The second fixed friction plate 1241 cannot rotate around the horizontal rotation shaft 1212.

[0078] The second fixed friction plate 1241 and the second rotating friction plate 1243 are arranged in contact with each other, and the contact surfaces are smooth surfaces;

[0079] The second pressure device 1242 is disposed between the fixing nut and the second fixing friction plate 1241;

[0080] The second pressure device 1242 is a disc spring;

[0081] On the outer side of the second pressure device 1242, a second fixed shield 1244 is also installed at the end of the horizontal rotating shaft 1212;

[0082] The second fixed shield 1244 is symmetrically arranged with the fixed shield 1211;

[0083] The second torque balancing device 123 is arranged on the torque balancing device mounting portion;

[0084] The second torque balancing device 123 is a torsion spring, and the mounting portion of the torque balancing device is a cylindrical wall 1231 disposed on the fixed shield 1211;

[0085] One end of the second torque balancing device 123 is fixedly connected to the fixed shield 1211, and the other end is fixedly installed to the second rotating support 122;

[0086] The third joint 13 is fixedly connected to the third fixing pipe 131 of the second rotating support 122;

[0087] The third fixed tube 131 and the through holes on the arc support plate of the second rotating support 122 are arranged corresponding to each other;

[0088] The third fixing tube 131 is provided with a rotation limiting groove, and the rotation limiting groove is used to limit the rotation angle of the first connecting tube 31 installed in the third fixing tube 131;

[0089] The rotation limiting groove is arranged on the tube wall of the third fixed tube 131 and arranged along the circumferential direction of the third fixed tube 131, and the angle range is 0-90 degrees;

[0090] One end of the first connecting pipe 31 is installed in the third fixing pipe 131;

[0091] The end of the third fixing tube 131 is provided with a limiting pin which matches the rotation limiting groove;

[0092] The second fixed shield 1244 and the fixed shield 1211 are also provided with a second joint 12 rotation limiting groove 1245;

[0093] The rotation limiting groove 1245 is used to limit the rotation angle of the second rotation support 122 of the second joint 12;

[0094] The rotation limiting groove 1245 is arranged on one side of the upper part of the second fixed shield 1244 and the fixed shield 1211;

[0095] The movable range of the second rotating support 122 in the rotating limit groove 1245 is based on the vertical direction, and the angle range is 0-90 degrees;

[0096] When the torsion spring of the second torque balancing device 123 is in a state of minimum torsion, the axis of the third fixed tube 131 on the second rotating support 122 is in a vertical state;

[0097] The second connecting component 2 comprises a fourth joint 21;

[0098] The fourth joint 21 is fixed to the end of the first connecting pipe 31;

[0099] The fourth joint 21 comprises a fourth fixed support 211 and a fourth movable support 212 which are hingedly connected to each other, and a fourth friction locking device is provided between the fourth fixed support 211 and the fourth movable support 212 .

[0100] It also includes a fifth joint 22 ; the rotation axis of the fifth joint 22 and the rotation axis of the fourth joint 21 are arranged perpendicular to each other.

[0101] The fifth joint 22 comprises a fifth fixed tube 221 fixedly connected to the fourth movable support 212, and a rotation limiting groove is provided in the fifth fixed tube 221, and the rotation limiting groove is used to limit the rotation angle of the second connecting tube 32 installed in the fifth fixed tube 221;

[0102] At least one rubber pipeline is provided inside the first joint 11 , the second joint 12 , the third joint 13 , the fourth joint 21 , the fifth joint 22 , the first connecting pipe 31 , and the second connecting pipe 32 . The lower part of the pipeline is connected to the relevant components inside the machine body, and the upper end is connected to the nozzle 4 .

[0103] When in use, the spray bar assembly is manually moved, and the spray bar assembly rotates around the first joint 11, the second joint 12, the third joint 13, the fourth joint 21, and the fifth joint 22; the first joint 11 can rotate 0-180 degrees, and the second joint can rotate 0-90 degrees; the spray bar assembly as a whole can perform a combination of up and down swings and left and right swings around the first joint 11 and the second joint, and the first connecting pipe 31 of the spray bar assembly can also rotate in a circumferential direction around the third joint 13; the first connecting pipe 31 and the second connecting pipe 32 can be folded around the fourth joint 21; and the second connecting pipe 32 can rotate in a circumferential direction around the fifth joint 22. The above-mentioned rotation and folding process can change the position and angle of the spray head.

[0104] During the adjustment of the nozzle position, due to the gravity of the spray rod assembly, the spray rod assembly is locked at the first locking device 113 while rotating around the first joint 11; when rotating around the second joint 12, the second locking device 124 of the second joint is locked; after locking, the spray rod can be automatically locked and adjusted at any angle according to the need of adjustment. When the spray rod assembly is folded around the fourth joint 21, the fourth friction locking device can lock the folding angle of the spray rod to prevent the problem of unstable spray rod position locking during treatment.

[0105] The second joint of the present invention is provided with a second torque balancing device 123. Since the gravity torque generated by the entire spray boom assembly will completely act on the second joint 12 during the process of the spray boom rotating and folding, a larger locking force will be required when the second joint is required to lock the spray boom position. The traditional friction locking joint will use a larger friction force to lock the joint position, but this joint will be difficult to adjust after locking. The torsion spring of the second torque balancing device 123 provides a torque opposite to the gravity direction of the connecting assembly, and the torque of the torsion spring is equal to the torque generated by the gravity of the connecting assembly. At this time, the second locking device 124 of the second joint will only be used for the position locking of the second joint. At this time, the locking friction force will be far less than the situation where the second torque balancing device 123 is not applicable. The second locking device 124 only needs a smaller inner part to complete the position locking of the connecting assembly. Such a joint is convenient for angle adjustment and avoids the problem of inconvenient joint folding caused by excessive friction of the joint locking device.

[0106] The present invention uses the design of two combined joints to integrate the three rotating joints of the horizontal swing, up and down swing of the spray rod, and the rotation of the spray rod around the first connecting pipe 31 into the first connecting component; the two rotating joints of the folding of the spray rod and the rotation of the spray rod around the second connecting pipe 32 are integrated into the second connecting component; the two integrated connecting components make the spray rod assembly have five joint degrees of freedom; the nozzle position adjustment of the spray rod assembly will be more free and flexible; at the same time, the combined design of the joints avoids the bending and folding of the internal components of the spray rod caused by the joint connection and combination process. The first joint, the second joint, and the third joint in the first connecting component are arranged vertically. During the horizontal swing, up and down swing, and rotation of the spray rod around the first connecting pipe 31, the pipe inside it has only one pipe bending position, and the pipe has fewer bending parts, which can avoid the problem of unsmooth water flow due to multiple pipe bends.

[0107] The specific implementation methods described above further illustrate the objectives, technical solutions and beneficial effects of the present invention in detail. It should be understood that the above description is only a specific implementation method of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the scope of protection of the present invention.

Claims

1. A spray bar assembly of a fumigation machine, the spray bar assembly is arranged on a machine body, and a spray head (4) is arranged at the upper end thereof; characterized in that: The spray rod assembly comprises a first connecting assembly (1), a second connecting assembly (2), and a connecting pipe (3); the first connecting assembly (1) comprises a first joint (11) having one end fixed to the machine body and rotating around a vertical axis; a second joint (12) hinged on the first joint (11) and rotating around a horizontal axis; the connecting pipe (3) comprises a first connecting pipe (31) interconnected with the second joint (12) and the second connecting assembly (2); a second connecting pipe (32) interconnected with the second connecting assembly (2) and the spray head (4); the second connecting assembly (2) comprises a fourth joint (21) rotating around an axis perpendicular to the axis of the connecting pipe (3); the first connecting assembly (1) further comprises a third joint (13) fixedly arranged with the second joint (12) and fixedly arranged with the end of the first connecting pipe (31); the rotation axis of the third joint (13) is arranged perpendicularly to the rotation axis of the second joint (12); the second connecting assembly (2) further comprises a fourth joint (21) fixedly arranged with the fourth joint (21) and fixedly arranged with the end of the second connecting pipe (32); The invention relates to a fifth joint (22) disposed on the upper part of the first joint (11); the rotation axis of the fifth joint (22) is arranged perpendicular to the rotation axis of the fourth joint (21); the second joint (12) comprises a second fixed support (121) fixed to the upper part of the first joint (11), a second rotating support (122) hingedly connected to the second fixed support (121), and a second torque balancing device (123); the second fixed support (121) comprises a fixed guard fixedly connected to the first rotating support (112) on the upper part of the first joint (11); The second rotating support (122) comprises two support plates (1221) arranged in parallel, and the second rotating support (122) is hingedly mounted on the horizontal rotating shaft (1212) via the support plates (1221); the second torque balancing device (123) is arranged between the fixed shield (1211) and the second rotating support (122), and is used to provide a torque in the opposite direction to the rotation direction of the second rotating support (122).

2. The spray bar assembly of a fumigator according to claim 1, characterized in that: The first joint (11) comprises a first fixed support (111) and a first rotating support (112) fixed to the machine body; the first rotating support (112) is hingedly mounted on the first fixed support (111) via a first hinge shaft (1121); a through hole is provided inside the first hinge shaft (1121); and the first locking device (113) is also included; the first locking device (113) comprises a first rotating friction plate (1131) which is arranged in contact with the lower part of the first fixed support (111) and is mounted on the first rotating support (112).

3. The spray bar assembly of a fumigator according to claim 2, characterized in that: The first rotating friction plate (1131) can be axially slidably arranged on the first hinge shaft (1121) of the first rotating support (112); the outer side of the first rotating friction plate (1131) is also provided with a first pressure device (1133) for providing pressure to the first rotating friction plate (1131).

4. The spray bar assembly of a fumigator according to claim 3, characterized in that: The two surfaces of the first rotating friction plate (1131) and the first fixed support (111) that contact each other are smooth surfaces.

5. The spray bar assembly of a fumigator according to claim 4, characterized in that: The second torque balancing device (123) is a torsion spring installed on the horizontal shaft (1212). One end of the second torque balancing device (123) is fixed to the fixed shield (1211), and the other end is fixed to the second rotating support (122).

6. A spray bar assembly for a fumigator according to claim 5, characterized in that: The second joint (12) includes a second locking device (124); the second locking device (124) includes a second fixed friction plate (1241); the second fixed friction plate (1241) and the second rotating support (122) are arranged in contact with each other, and the second fixed friction plate (1241) is slidably installed on the horizontal rotating shaft (1212); the outer side of the second fixed friction plate (1241) is also provided with a second pressure device (1242) for providing pressure to the second fixed friction plate (1241) and the second rotating support (122).

7. A spray bar assembly for a fumigator according to claim 6, characterized in that: The two surfaces of the second fixed friction plate (1241) and the second rotating support (122) that contact each other are smooth surfaces.

8. The spray bar assembly of a fumigator according to claim 7, characterized in that: The third joint (13) comprises a third fixed tube (131) fixedly connected to the second rotating support (122); a through hole is provided at the fixing position of the third fixed tube (131) and the second rotating support (122); a rotation limiting groove is provided in the third fixed tube (131); the rotation limiting groove is used to limit the rotation angle of the first connecting tube (31) installed in the third fixed tube (1221).

9. A spray bar assembly for a fumigator according to claim 8, characterized in that: The fourth joint (21) comprises a fourth fixed support (211) and a fourth movable support (212) which are hingedly connected to each other, and a fourth friction locking device is provided between the fourth fixed support (211) and the fourth movable support (212).

10. A spray bar assembly for a fumigator according to claim 9, characterized in that: The fifth joint (22) comprises a fifth fixed tube (221) fixedly connected to the fourth movable support (212), and a rotation limiting groove (1222) is provided in the fifth fixed tube (221), and the rotation limiting groove (1222) is used to limit the rotation angle of the second connecting tube (32) installed in the fifth fixed tube (221).

11. A spray bar assembly for a fumigator according to claim 10, characterized in that: The first pressure device (1133) and the second pressure device (1242) are disc springs.

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