Traveling wave tube power amplifier helix welding fixture

Abstract

The application discloses a travelling wave tube power amplifier helix welding clamp, which comprises a support, an inner support cylinder horizontally arranged along the front-back direction is arranged on the upper portion of the support, three main clamping blocks and three auxiliary clamping blocks are radially and equiangularly connected to the inner circumferences of the inner support cylinder, the main clamping blocks and the auxiliary clamping blocks are equiangularly and staggeredly arranged, the main clamping blocks on the upper portion of the inner support cylinder are vertically upward, and the auxiliary clamping blocks on the bottom of the inner support cylinder are vertically downward. When the application is used, the clamping rods and the helix along the front-back horizontal direction are sequentially put into the second channel and the third channel, then the two main clamping blocks on the bottom of the inner support cylinder are made close to each other by the distance adjusting mechanism to clamp the helix, then the clamping rods along the front-back horizontal direction are sequentially put into the first channel and the fourth channel, then the two clamping rods are respectively in contact with the left and right sides of the helix, and then the main clamping blocks and the auxiliary clamping blocks on the upper portion of the inner support cylinder are made close to each other by controlling the distance adjusting mechanism.

Description

TECHNICAL FIELD

[0001] The present application relates to a clamp, in particular to a helix welding clamp for a traveling wave tube power amplifier. BACKGROUND

[0002] The slow wave circuit is an important part of the traveling wave tube, and the slow wave circuit of the traveling wave tube is mainly divided into two types, namely the helix type circuit and the coupled cavity type circuit. The helix is an essential part of the helix type circuit. The Chinese invention patent with the patent number CN113770629A provides a traveling wave tube helix, clamping rod welding tool, which is used for clamping the helix and the clamping rod to facilitate welding. However, when using the device, the helix needs to be first threaded through the core rod, then the two ends of the core rod are fixed on the side plate, and then the three clamping rods are respectively installed in the three gaps between the adjacent positioning blocks. This assembly method is not simple and convenient, especially the filling operation of the clamping rod is not convenient: when the gap is large, it will affect the clamping accuracy of the clamping block; when the gap is small, it is difficult to manually fill the clamping rod, and it is difficult to align and prone to deformation due to hand shaking. The deficiencies of the prior art are highlighted. SUMMARY

[0003] The purpose of the present application is to provide a helix welding clamp for a traveling wave tube power amplifier to solve the technical problem that the existing clamp is not simple and convenient when assembling the helix and the clamping rod.

[0004] To achieve the above-mentioned purpose, the present application adopts the following technical scheme:

[0005] A helix welding clamp for a traveling wave tube power amplifier, comprising a support member, an inner support cylinder horizontally arranged along the front and rear directions is installed on the upper part of the support member, three main clamping blocks and three auxiliary clamping blocks are radially slidably connected at equal angles on the inner circumference of the inner support cylinder, the main clamping blocks and the auxiliary clamping blocks are arranged at equal angles and interlaced with each other, the main clamping blocks on the upper part of the inner support cylinder are vertically upward, the auxiliary clamping blocks on the bottom of the inner support cylinder are vertically downward, a plurality of chambers are formed in the inner support cylinder, which are radially arranged compared with the inner support cylinder, each of the main clamping blocks and the auxiliary clamping blocks is located in each chamber and is radially slidably connected, the parts close to the axis of the inner support cylinder of each chamber are communicated with each other, the inner support cylinder is also provided with a first channel, a second channel, a third channel and a fourth channel, the ends of one of the first channel, the second channel, the third channel and the fourth channel respectively penetrate the outer circumferential wall of the inner support cylinder, the first channel and the fourth channel are respectively communicated with the chambers in which the two auxiliary clamping blocks on the upper part of the inner support cylinder are located, the second channel and the third channel are respectively communicated with the chambers in which the main clamping blocks on the upper part of the inner support cylinder are located, and the main clamping blocks, the auxiliary clamping blocks and the inner support cylinder are jointly installed with a distance adjusting mechanism.

[0006] On the basis of the above technical scheme, the support piece comprises a support frame and an outer support cylinder, the upper part of the support frame is fixed with the outer support cylinder arranged horizontally along the front-rear direction, the inner support cylinder is coaxially connected in the outer support cylinder, the outer support cylinder is penetrated by a flared first slot, a flared second slot, a flared third slot and a flared fourth slot along the up-down inclined direction, the flared parts of the first slot, the second slot, the third slot and the fourth slot are outward of the outer support cylinder, the first slot, the second slot, the third slot and the fourth slot can be aligned and communicated with the first channel, the second channel, the third channel and the fourth channel respectively, when the second slot is communicated with the second channel, the first slot, the third slot and the fourth slot are respectively located at the right side of the first channel, the third channel and the fourth channel, when the third slot is communicated with the third channel, the first slot and the fourth slot are respectively located at the right side of the first channel and the fourth channel, when the third slot is communicated with the third channel, the second slot is located at the left side of the second channel, when the first slot and the fourth slot are communicated with the first channel and the fourth channel respectively, the second slot and the third slot are respectively located at the left side of the second channel and the third channel, and the outer support cylinder and the inner support cylinder are jointly installed with a mechanical rotary driving mechanism.

[0007] On the basis of the above technical scheme, the radial end of each main clamping block close to the axis of the inner support cylinder is provided with a main arc-shaped slot adapted to the outer diameter of the spiral to be welded, the radial end of each auxiliary clamping block away from the axis of the inner support cylinder is provided with an auxiliary arc-shaped slot adapted to the outer diameter of the cylindrical clamping rod to be welded, the radial end of each auxiliary clamping block away from the axis of the inner support cylinder is fixed with a helical compression spring parallel to the sliding direction thereof, the other end of each compression spring is fixed with the inner wall of the chamber where the auxiliary clamping block is located away from the axis of the inner support cylinder, and each auxiliary clamping block has a tendency to slide to the axis of the inner support cylinder under the elastic repulsion of the compression spring.

[0008] On the basis of the above technical scheme, the distance adjusting mechanism comprises a guide rod, a guide ring and a protrusion, the front and rear ends of each auxiliary clamping block are fixed with a horizontal guide rod, the front and rear parts of the outer support cylinder are coaxially fixed with a guide ring, the outer circumferential wall of the guide ring is fixed with three protrusions at equal angles, the guide rod can be in contact with the outer wall where the outer contour of the protrusion is located under the elastic repulsion of the compression spring, and each auxiliary clamping block is in a state of moving away from each other when the guide rod is in contact with the outer wall where the outer contour of the protrusion is located.

[0009] On the basis of the above technical scheme, the distance adjusting mechanism further comprises a tension spring, a contact arc plate, a guide arc plate, a through opening, a sliding frame, a sliding block, a through slot, and a butterfly bolt, each of the main clamping blocks is fixed with a helical tension spring parallel to the sliding direction of the main clamping block, the other end of each of the tension springs is fixed with the inner wall of the chamber away from the axis of the inner supporting cylinder, each of the main clamping blocks has a tendency to slide away from the axis of the inner supporting cylinder under the elastic tension of the tension spring, each of the front and rear ends of the main clamping block is fixed with a contact arc plate, each of the front and rear parts of the outer supporting cylinder is fixed with a guide arc plate, the bottom inner wall of the guide arc plate is an upwardly open and coaxial arc with the inner supporting cylinder, and the upper inner wall is a leftwardly and upwardly curved and away arc, the contact arc plate can be in contact with the inner arc wall of the guide arc plate under the elastic tension of the tension spring, the guide ring is equal in width to the protrusion, the width of the guide arc plate is greater than the width of the guide ring and the protrusion, the guide ring is fixed with the bottom of the guide arc plate, the right upper part of the guide arc plate penetrates the through opening for accommodating the guide rod, the contact arc plate cannot pass through the through opening, the contact arc plates at the front and rear ends of the main clamping block are located in the gap between the front and rear guide rings and do not contact the guide rings, each of the left and right lower parts of the outer supporting cylinder is radially and slidingly connected with a sliding frame, each of the front and rear parts of the sliding frame is fixed with a sliding block, each of the left and right parts of the guide ring and the guide arc plate penetrates a notch-shaped through slot, the sliding block can be matched and combined with the through slot to form a complete guide ring and guide arc plate when the sliding block slides to the middle part of the outer supporting cylinder, each of the middle parts of the two sliding frames is rotationally connected with a butterfly bolt, the butterfly bolt is detachably and threadedly connected with the outer supporting cylinder, the guide arc plates at the front and rear ends of the secondary clamping block of the bottom of the inner supporting cylinder are in full contact with the sliding blocks when the second channel is located between the first slot and the second slot, the guide arc plates at the front and rear ends of the secondary clamping block of the bottom of the inner supporting cylinder are in full contact with the sliding blocks when the second slot is aligned and communicated with the second channel, and the guide arc plates at the front and rear ends of the secondary clamping block of the bottom of the inner supporting cylinder are in full contact with the sliding blocks when the third slot is aligned and communicated with the third channel.

[0010] On the basis of the above technical scheme, the right lower part of the outer supporting cylinder penetrates a discharge opening, the inner supporting cylinder can make the discharge opening aligned and communicated with the third channel when the inner supporting cylinder is rotated to a certain angle, the two main clamping blocks are aligned with the two sliding frames and make the contact arc plates on the main clamping blocks fully contact the sliding blocks when the discharge opening is aligned and communicated with the third channel, the main clamping block where the contact arc plate is located can move under the elastic tension of the tension spring and the thrust of the sliding block when the contact arc plate fully contacts the sliding block and the sliding frame reciprocally slides radially, and the width of the discharge opening and the width of the third channel are both greater than the sum of the outer diameter of the helical line to be welded and the outer diameters of the two clamping rods.

[0011] On the basis of the above technical scheme, the mechanical rotary driving mechanism comprises a support seat, a support shaft, a gear, a worm wheel, a worm, a regular hexagonal prism and an outer gear ring, the left part of the outer support cylinder is fixed with the support seat, the support seat is rotationally connected with the support shaft in the front-rear direction, the rear end of the support shaft is coaxially fixed with the gear, and the front end is coaxially fixed with the worm wheel, the front part of the support seat is rotationally connected with the vertical worm, the top end of the worm is coaxially fixed with the regular hexagonal prism, the worm is engaged with the worm wheel, and the front part of the inner support cylinder is coaxially fixed with the outer gear ring, and the outer gear ring is engaged with the gear.

[0012] Compared with the prior art, the present application has the following advantages: when the present application is used, the clamping rods and the spiral line along the front-rear horizontal direction are sequentially put into the second channel and the third channel, then the two main clamping blocks at the bottom of the inner support cylinder are made close by the distance adjusting mechanism to clamp the spiral line, then the clamping rods along the front-rear horizontal direction are sequentially put into the first channel and the fourth channel, then the two clamping rods are respectively in contact with the left and right sides of the spiral line, and then the main clamping block and the auxiliary clamping block at the upper part of the inner support cylinder are made close by controlling the distance adjusting mechanism, so that the spiral line and the clamping rod are clamped. This assembly method is simple and convenient by using the natural gravity feeding method. BRIEF DESCRIPTION OF DRAWINGS

[0013] Figure 1 It is a three-dimensional structure schematic diagram of the present application.

[0014] Figure 2 It is an axonometric structure schematic diagram of the present application when the gear and the outer gear ring are matched.

[0015] Figure 3 It is a front cross-sectional structure schematic diagram of the inner support cylinder and the outer support cylinder in the a1 state of the present application.

[0016] Figure 4 It is a front cross-sectional structure schematic diagram of the inner support cylinder and the outer support cylinder in the a2 state of the present application.

[0017] Figure 5 It is a front cross-sectional structure schematic diagram of the inner support cylinder and the outer support cylinder in the a3 state of the present application.

[0018] Figure 6 It is a front cross-sectional structure schematic diagram of the inner support cylinder and the outer support cylinder in the a4 state of the present application.

[0019] Figure 7 It is a front cross-sectional structure schematic diagram of the inner support cylinder and the outer support cylinder in the a5 state of the present application.

[0020] Figure 8 It is a partial front view structure schematic diagram in the a5 state of the present application.

[0021] Figure 9This is a front cross-sectional view of the inner and outer support cylinders in state a6 of the present invention.

[0022] In the diagram: 1. Support component; 2. Inner support cylinder; 3. Main clamping block; 4. Secondary clamping block; 5. Compartment; 6. Channel 1; 7. Channel 2; 8. Channel 3; 9. Channel 4; 10. Adjustment mechanism; 11. Support frame; 12. Outer support cylinder; 13. Slot 1; 14. Slot 2; 15. Slot 3; 16. Slot 4; 17. Mechanical rotation drive mechanism; 18. Main arc-shaped slot; 19. Secondary arc-shaped slot. 20. Slot, Compression spring, 21. Guide rod, 22. Guide ring, 23. Protrusion, 24. Tension spring, 25. Contact arc plate, 26. Guide arc plate, 27. Through port, 28. Sliding frame, 29. Slider, 30. Through slot, 33. Wing bolt, 34. Discharge port, 35. Support seat, 36. Support shaft, 37. Gear, 38. Worm gear, 39. Worm, 40. Regular hexagonal prism, 41. External gear ring. Detailed Implementation

[0023] The present invention will be further described in detail below with reference to the accompanying drawings and specific embodiments.

[0024] like Figures 1-9 As shown, a spiral welding fixture for a traveling wave tube power amplifier includes a support member 1. An inner support cylinder 2, horizontally arranged along the front-rear direction, is mounted on the upper part of the support member 1. Three main clamping blocks 3 and three auxiliary clamping blocks 4 are radially slidably connected at equal angles within the inner support cylinder 2. The main clamping blocks 3 and auxiliary clamping blocks 4 are staggered at equal angles. The main clamping blocks 3 at the upper part of the inner support cylinder 2 are vertically upward, and the auxiliary clamping blocks 4 at the bottom of the inner support cylinder 2 are vertically downward. Multiple chambers 5 are radially arranged within the inner support cylinder 2. Each main clamping block 3 and auxiliary clamping block 4 is located within its respective chamber 5 and slides radially. The compartments 5 near the axis of the inner support cylinder 2 are interconnected. The inner support cylinder 2 also has a first channel 6, a second channel 7, a third channel 8, and a fourth channel 9. The end of one of the first channel 6, the second channel 7, the third channel 8, and the fourth channel 9 passes through the outer circumferential wall of the inner support cylinder 2. The first channel 6 and the fourth channel 9 are respectively connected to the compartments 5 where the two auxiliary clamping blocks 4 are located on the upper part of the inner support cylinder 2. The second channel 7 and the third channel 8 are respectively connected to the compartments 5 where the main clamping block 3 is located on the upper part of the inner support cylinder 2. The main clamping block 3, the auxiliary clamping blocks 4, and the inner support cylinder 2 are all equipped with an adjustment mechanism 10.

[0025] When in use, first, the upper main clamping block 3 and the auxiliary clamping block 4 of the inner supporting cylinder 2 are fully separated from each other by the distance adjusting mechanism 10, and the two main clamping blocks 3 at the bottom of the inner supporting cylinder 2 are slightly separated (only enough to accommodate the spiral into the gap between them), at this time, the auxiliary clamping block 4 removes the shielding of the first channel 6 and the fourth channel 9, and the main clamping block 3 removes the shielding of the second channel 7 and the third channel 8, then the clamping rod and the spiral along the front and rear horizontal direction are sequentially put into the second channel 7 and the third channel 8, so that the clamping rod first contacts the top end of the auxiliary clamping block 4 at the bottom of the inner supporting cylinder 2, then the spiral is above the clamping rod and contacts it, then the two main clamping blocks 3 at the bottom of the inner supporting cylinder 2 are close to each other by the distance adjusting mechanism 10 to achieve clamping of the spiral, then the clamping rod along the front and rear horizontal direction is sequentially put into the first channel 6 and the fourth channel 9, at this time, the two clamping rods are respectively in contact with the left and right sides of the spiral, then the upper main clamping block 3 and the auxiliary clamping block 4 of the inner supporting cylinder 2 are close to each other by controlling the distance adjusting mechanism 10, that is, the spiral and the clamping rod are completely clamped, and this assembly method relying on gravity natural feeding is simple and convenient. Before the spiral and the clamping rod are completely clamped, the front and rear positions of the clamping rod and the spiral can be adjusted by using external tools through the middle penetrating part of the inner supporting cylinder 2 according to the need to ensure the accuracy of the front and rear positions, then the device together with the clamping rod and the spiral is sent into the furnace for heating to realize welding, after welding, the main clamping block 3 and the auxiliary clamping block 4 are separated from each other by the distance adjusting mechanism 10, then the welded spiral and clamping rod are pushed out along the front and rear directions by using tools to assemble again.

[0026] The support 1 comprises a support frame 11 and an outer support cylinder 12, the outer support cylinder 12 is horizontally arranged on the upper part of the support frame 11, the inner support cylinder 2 is coaxially connected in the outer support cylinder 12, the outer support cylinder 12 is penetrated by a flared first slot 13, a second slot 14, a third slot 15 and a fourth slot 16 in the up-down inclined direction, the flared parts of the first slot 13, the second slot 14, the third slot 15 and the fourth slot 16 are outside the outer support cylinder 12, the first slot 13, the second slot 14, the third slot 15 and the fourth slot 16 can be respectively aligned with the first channel 6, the second channel 7, the third channel 8 and the fourth channel 9, when the second slot 14 is communicated with the second channel 7, the first slot 13, the third slot 15 and the fourth slot 16 are respectively located at the right side of the first channel 6, the third channel 8 and the fourth channel 9, when the third slot 15 is communicated with the third channel 8, the first slot 13 and the fourth slot 16 are respectively located at the right side of the first channel 6 and the fourth channel 9, when the third slot 15 is communicated with the third channel 8, the second slot 14 is located at the left side of the second channel 7, when the first slot 13 and the fourth slot 16 are communicated with the first channel 6 and the fourth channel 9, the second slot 14 and the third slot 15 are respectively located at the left side of the second channel 7 and the third channel 8, the outer support cylinder 12 and the inner support cylinder 2 are jointly installed with a mechanical rotary drive mechanism 17.

[0027] Further, in order to improve the convenience of the clamping rod and the spiral wire, the upper main clamping block 3 and the auxiliary clamping block 4 of the inner support cylinder 2 are fully separated from each other by the distance adjusting mechanism 10, and the two main clamping blocks 3 at the bottom of the inner support cylinder 2 are slightly separated (which is enough to accommodate the spiral wire into the gap between them), at this time, the auxiliary clamping block 4 removes the shielding of the first channel 6 and the fourth channel 9, and the main clamping block 3 removes the shielding of the second channel 7 and the third channel 8, before filling, the inner support cylinder 2 is controlled to rotate by the mechanical rotary drive mechanism 17, so that the first channel 6, the second channel 7, the third channel 8 and the fourth channel 9 are all located at the left side of the first slot 13, the second slot 14, the third slot 15 and the fourth slot 16, and the second channel 7 is located between the first slot 13 and the second slot 14 (this state is called a1 state, as shown in Figure 3 , then the clamping rod, the clamping rod, the spiral wire and the clamping rod are respectively put into the first slot 13, the second slot 14, the third slot 15 and the fourth slot 16, and then the inner support cylinder 2 is controlled to rotate clockwise (as observed from the main view angle, the following description about the rotation direction is made from the main view angle, and will not be repeated) by the mechanical rotary drive mechanism 17, so that the second slot 14 can be first aligned with the second channel 7 (this state is called a2 state, as shown in Figure 4 , then the limiting rod is first in contact with the top end of the auxiliary clamping block 4 at the bottom of the inner support cylinder 2, with the rotation of the inner support cylinder 2, the third channel 8 is aligned with the third slot 15 (this state is called a3 state, as shown in Figure 5As shown in FIG. 6, at this time, the spiral line falls along the No. 2 slot 14, the No. 2 channel 7 and the chamber 5, so that the spiral line is above the clamping rod and in contact with it, then the two main clamping blocks 3 at the bottom of the inner supporting cylinder 2 are made close by the distance adjusting mechanism 10 to clamp the spiral line, then the inner supporting cylinder 2 is controlled to continue rotating by the mechanical rotary driving mechanism 17, finally the No. 1 slot 13 is communicated with the No. 1 channel 6, and the No. 4 slot 16 is communicated with the No. 4 channel 9 (this state is called a4 state, as shown in FIG. 7). Figure 6 As shown in FIG. 8, at this time, the two clamping rods fall to the left and right sides of the spiral line along the No. 1 slot 13, the No. 1 channel 6, the No. 4 slot 16 and the No. 4 channel 9, then the upper main clamping block 3 and the three auxiliary clamping blocks 4 of the inner supporting cylinder 2 are made close by controlling the distance adjusting mechanism 10 (this state is called a5 state, as shown in FIG. 9). Figure 7 And 8 As shown in FIG. 10, that is, the spiral line and the clamping rod are clamped. This filling method only needs to put the corresponding clamping rod and spiral line in the No. 1 slot 13, the No. 2 slot 14, the No. 3 slot 15 and the No. 4 slot 16 in advance without specific order, then the inner supporting cylinder 2 is controlled to rotate clockwise, on the one hand, compared with directly filling the material to the No. 1 channel 6, the No. 2 channel 7, the No. 3 channel 8 and the No. 4 channel 9 in order by human, it is more convenient, on the other hand, compared with manually filling the material to the No. 1 channel 6, the No. 2 channel 7, the No. 3 channel 8 and the No. 4 channel 9, it is more stable to pass through the No. 1 slot 13, the No. 2 slot 14, the No. 3 slot 15 and the No. 4 slot 16 first and then fall through the No. 1 channel 6, the No. 2 channel 7, the No. 3 channel 8 and the No. 4 channel 9.

[0028] The radial end of each main clamping block 3 close to the axis of the inner supporting cylinder 2 is respectively provided with a main arc-shaped slot 18 which is adapted to the outer diameter of the spiral line to be welded, the radial end of each auxiliary clamping block 4 close to the axis of the inner supporting cylinder 2 is respectively provided with an auxiliary arc-shaped slot 19 which is adapted to the outer diameter of the cylindrical clamping rod to be welded, the radial end of each auxiliary clamping block 4 away from the axis of the inner supporting cylinder 2 is respectively fixed with a spiral compression spring 20 which is parallel to the sliding direction of the auxiliary clamping block 4, the other end of each compression spring 20 is respectively fixed with the inner wall of the chamber 5 away from the axis of the inner supporting cylinder 2, each auxiliary clamping block 4 has a tendency to slide to the axis of the inner supporting cylinder 2 under the elastic repulsion of the compression spring 20.

[0029] By setting the main arc-shaped slot 18 and the auxiliary arc-shaped slot 19, the clamping of the main clamping block 3 and the auxiliary clamping block 4 to the spiral line and the clamping rod is more accurate, and by setting the compression spring 20, a certain elastic clamping force can be applied to the clamping rod, so as to ensure that the clamping rod is in full contact with the spiral line.

[0030] The distance adjusting mechanism 10 comprises guide rods 21, guide rings 22, protrusions 23, the front and back ends of each of the secondary clamping blocks 4 are fixed with horizontal guide rods 21, the front and back parts of the outer supporting cylinder 12 are coaxially fixed with guide rings 22, the outer circumferential wall of the guide rings 22 is fixed with three protrusions 23 at equal angles, the guide rods 21 can be in contact with the outer wall where the outer contour of the protrusions 23 is located under the elastic repulsion of the compression spring 20, when the guide rods 21 are in contact with the outer wall where the outer contour of the protrusions 23 is located, each of the secondary clamping blocks 4 is in a state of being away from each other.

[0031] Further, when in the a1, a2, a3 and a4 states, the guide rods 21 are in contact with the protrusions 23, at this time, the secondary clamping blocks 4 are all in a state of being away from each other, thereby facilitating the falling of the clamping rod, when in the a5 state, the inner supporting cylinder 2 is further rotated clockwise to make each of the guide rods 21 be out of contact with the protrusions 23, and under the elastic repulsion of the compression spring 20, the guide rods 21 are close to the guide rings 22, thereby realizing the matching of the secondary arc-shaped grooves 19 and the clamping rod, that is, realizing the close clamping of the clamping rod and the spiral line.

[0032] The distance adjusting mechanism 10 further comprises a tension spring 24, a contact arc plate 25, a guide arc plate 26, a through hole 27, a sliding frame 28, a sliding block 29, a through slot 30, a butterfly bolt 33, each of the main clamping blocks 3 is fixed with a helical tension spring 24 parallel to the sliding direction of the main clamping block 3 at the radial end away from the axis of the inner supporting cylinder 2, the other end of each of the tension springs 24 is fixed with the inner wall of the chamber 5 away from the axis of the inner supporting cylinder 2 where the main clamping block 3 is located, each of the main clamping blocks 3 has a tendency to slide away from the axis of the inner supporting cylinder 2 under the elastic tension of the tension spring 24, the front and rear ends of each of the main clamping blocks 3 are fixed with a contact arc plate 25, the front and rear parts of the outer supporting cylinder 12 are fixed with a guide arc plate 26, the bottom inner wall of the guide arc plate 26 is an upwardly open and coaxial arc with the inner supporting cylinder 2, and the upper inner wall is a leftward and upward smoothly curved and away arc, the contact arc plate 25 can be in contact with the inner arc wall of the guide arc plate 26 under the elastic tension of the tension spring 24, the guide ring 22 is equal in width to the protrusion 23, the width of the guide arc plate 26 is greater than the width of the guide ring 22 and the protrusion 23, the guide ring 22 is fixed with the bottom of the guide arc plate 26, the right upper part of the guide arc plate 26 penetrates the through hole 27 for accommodating the guide rod 21, the contact arc plate 25 cannot pass through the through hole 27, the contact arc plates 25 at the front and rear ends of the main clamping blocks 3 are located in the gap between the front and rear guide rings 22 without contacting the guide rings 22, the left and right lower parts of the outer supporting cylinder 12 are respectively connected with the sliding frame 28, the front and rear parts of the sliding frame 28 are respectively fixed with the sliding block 29, the left and right parts of the guide ring 22 and the guide arc plate 26 respectively penetrate the notch-shaped through slot 30, the sliding block 29 can be matched and combined with the through slot 30 to form a complete guide ring 22 and guide arc plate 26 when the sliding block 29 slides into the middle part of the outer supporting cylinder 12, the butterfly bolt 33 is rotatably connected with the middle part of each of the sliding frames 28, the butterfly bolt 33 is detachably threadedly connected with the outer supporting cylinder 12, the guide arc plates 26 at the front and rear ends of the auxiliary clamping blocks 4 at the bottom of the inner supporting cylinder 2 are in full contact with the sliding blocks 29 when the second channel 7 is located between the first slot 13 and the second slot 14, the guide arc plates 26 at the front and rear ends of the auxiliary clamping blocks 4 at the bottom of the inner supporting cylinder 2 are in full contact with the sliding blocks 29 when the second slot 14 is aligned and communicated with the second channel 7, the guide arc plates 26 at the front and rear ends of the auxiliary clamping blocks 4 at the bottom of the inner supporting cylinder 2 are in full contact with the sliding blocks 29 when the third slot 15 is aligned and communicated with the third channel 8.

[0033] Further, when in a1, a2, a3 and a4 state, the guide rod 21 is in contact with the protrusion 23, at this time, the sub-clamping block 4 is in a state of moving away from each other, so as to facilitate the falling of the clamping rod, when in a5 state, the sub-clamping block 4 is separated from the protrusion 23, and under the action of the elastic repulsion of the compression spring 20, it approaches the guide ring 22, so as to realize the fitting of the sub-arc groove 19 and the clamping rod, that is, the fitting and clamping of the clamping rod and the spiral line; When in a1, a2, a3 and a4 state, the contact arc plate 25 where the main clamping block 3 on the upper part of the inner supporting cylinder 2 is located is not in contact with the inner arc wall of the guide arc plate 26, so it moves away from the axis of the inner supporting cylinder 2 under the action of the elastic tension of the tension spring 24, thereby removing the shielding of the second channel 7 and the third channel 8, and at this time, the two main clamping blocks 3 at the bottom of the inner supporting cylinder 2 are in contact with the slider 29, at this time, by loosening the butterfly bolt 33, the slider 29 can slightly move away from the axis of the inner supporting cylinder 2, so that the two main clamping blocks 3 at the bottom of the inner supporting cylinder 2 slightly move away under the action of the elastic tension of the tension spring 24, thereby facilitating the spiral line to fall into the gap between the two main clamping blocks 3, after the spiral line falls in, tighten the butterfly bolt 33, so that the two main clamping blocks 3 at the bottom of the inner supporting cylinder 2 move close to each other under the pushing of the slider 29 on the contact arc plate 25, thereby realizing the clamping of the spiral line, and when in a5 state, the inner supporting cylinder 2 further rotates clockwise to make each contact arc plate 25 contact with the equal-diameter inner arc wall at the bottom of the guide arc plate 26, thereby making each main clamping block 3 move close to each other, thereby realizing the clamping of the spiral line.

[0034] The outer supporting cylinder 12 has a discharge port 34 penetrating the lower right part, and when the inner supporting cylinder 2 rotates to a certain angle, the discharge port 34 can be aligned and communicated with the third channel 8, when the discharge port 34 is aligned and communicated with the third channel 8, the two main clamping blocks 3 are aligned with the two sliding frames 28, and the contact arc plate 25 on the main clamping block 3 is in full contact with the slider 29, when the contact arc plate 25 is in full contact with the slider 29 and the sliding frame 28 reciprocates radially, the main clamping block 3 where the contact arc plate 25 is located can move under the action of the elastic tension of the tension spring 24 and the pushing force of the slider 29, the width of the discharge port 34 and the width of the third channel 8 are both greater than the sum of the outer diameter of the spiral line to be welded and the outer diameter of the two clamping rods.

[0035] Further, by controlling the rotation of the inner support cylinder 2 to align the third channel 8 with the discharge port 34, the contact arc plates 25 of the two main clamping blocks 3 at the bottom of the inner support cylinder 2 are in full contact with the sliding blocks 29, then the butterfly bolts 33 on the right side of the inner support cylinder 2 are loosened, the threaded connection between the butterfly bolts 33 and the outer support cylinder 12 is released, so that the right main clamping block 3 of the inner support cylinder 2 is away from the axis of the inner support cylinder 2 under the tension of the tension spring 24, and at this time the contact arc plates 25 of the main clamping block 3 at the upper part of the inner support cylinder 2 are separated from the guide arc plates 26, so that they are away from the spiral line under the tension of the tension spring 24, and at this time the guide rod 21 is in contact with the protrusion 23, so that the auxiliary clamping blocks 4 are away from each other (this state is referred to as a6 state, as shown in Figure 9 at this time the spiral line loses the clamping of the two main clamping blocks 3 and three auxiliary clamping blocks 4, and can freely fall under the action of gravity and be conveniently discharged from the third channel 8 and the discharge port 34.

[0036] The mechanical rotary drive mechanism 17 includes a support seat 35, a support shaft 36, a gear 37, a worm wheel 38, a worm 39, a regular hexagonal prism 40, and an outer gear ring 41, the support seat 35 is fixed on the left part of the outer support cylinder 12, the support shaft 36 is rotationally connected to the support seat 35 in the front-rear direction, the gear 37 is coaxially fixed on the rear end of the support shaft 36, and the worm wheel 38 is coaxially fixed on the front end of the support shaft 36, the worm 39 is vertically rotationally connected to the front part of the support seat 35, the regular hexagonal prism 40 is coaxially fixed on the top end of the worm 39, the worm 39 is engaged with the worm wheel 38, and the outer gear ring 41 is coaxially fixed on the front part of the inner support cylinder 2, and the outer gear ring 41 is engaged with the gear 37.

[0037] By clamping the regular hexagonal prism 40 with a tool (such as a wrench) to rotate it, the inner support cylinder 2 can be rotated through the worm 39, the worm wheel 38, the gear 37, and the outer gear ring 41, and the self-locking nature of the engagement between the worm 39 and the worm wheel 38 can reduce accidental rotation of the inner support cylinder 2.

[0038] The above describes the preferred embodiments of the present application, and for those skilled in the art, according to the teachings of the present application, changes, modifications, replacements, and variations to the embodiments without departing from the principles and spirits of the present application still fall within the protection scope of the present application.

Claims

1. A traveling wave tube power amplifier helix welding clamp, comprising a support (1), an inner support cylinder (2) horizontally arranged along the front-back direction is mounted on the upper part of the support (1), three main clamping blocks (3) and three auxiliary clamping blocks (4) are radially and equiangularly slidably connected to the inner circumference of the inner support cylinder (2), each of the main clamping blocks (3) and the auxiliary clamping blocks (4) are equiangularly and interlacedly arranged, the main clamping blocks (3) on the upper part of the inner support cylinder (2) are vertically upward, the auxiliary clamping blocks (4) on the bottom of the inner support cylinder (2) are vertically downward, a plurality of chambers (5) are radially arranged in the inner support cylinder (2), each of the main clamping blocks (3) and the auxiliary clamping blocks (4) are located in each of the chambers (5) and are radially slidably connected, and the parts close to the axis of the inner support cylinder (2) of each of the chambers (5) are communicated with each other, characterized in that: The inner support cylinder (2) is also provided with a first channel (6), a second channel (7), a third channel (8) and a fourth channel (9), one end of each of the first channel (6), the second channel (7), the third channel (8) and the fourth channel (9) penetrates the outer circumferential wall of the inner support cylinder (2), the first channel (6) and the fourth channel (9) are in communication with the chamber (5) where the two auxiliary clamping blocks (4) on the upper part of the inner support cylinder (2) are located, the second channel (7) and the third channel (8) are in communication with the chamber (5) where the main clamping block (3) on the upper part of the inner support cylinder (2) is located, the main clamping block (3), the auxiliary clamping block (4) and the inner support cylinder (2) are jointly provided with a pitch adjusting mechanism (10); The support piece (1) comprises a support frame (11) and an outer support cylinder (12), the outer support cylinder (12) horizontally arranged along the front and back direction is fixed on the upper part of the support frame (11), the inner support cylinder (2) is coaxially and rotatably connected in the outer support cylinder (12), the outer support cylinder (12) penetrates the flared first slot (13), the second slot (14), the third slot (15) and the fourth slot (16) along the upward and downward inclined direction, the flared part of the first slot (13), the second slot (14), the third slot (15) and the fourth slot (16) is outward of the outer support cylinder (12), the first slot (13), the second slot (14), the third slot (15) and the fourth slot (16) can be aligned and communicated with the first channel (6), the second channel (7), the third channel (8) and the fourth channel (9) respectively, when the second slot (14) is communicated with the second channel (7), the first slot (13), the third slot (15) and the fourth slot (16) are located at the right side of the first channel (6), the third channel (8) and the fourth channel (9) respectively, when the third slot (15) is communicated with the third channel (8), the first slot (13) and the fourth slot (16) are located at the right side of the first channel (6) and the fourth channel (9) respectively, when the third slot (15) is communicated with the third channel (8), the second slot (14) is located at the left side of the second channel (7), when the first slot (13) and the fourth slot (16) are communicated with the first channel (6) and the fourth channel (9) respectively, the second slot (14) and the third slot (15) are located at the left side of the second channel (7) and the third channel (8) respectively, the outer support cylinder (12) and the inner support cylinder (2) are jointly provided with a mechanical rotary driving mechanism (17).

2. A helix welding fixture for a traveling wave tube power amplifier as defined in claim 1, wherein: Each of the main clamping blocks (3) is provided with a main arc-shaped slot (18) at the radial end close to the axis of the inner support cylinder (2), which is adapted to the outer diameter of the helical line to be welded; each of the auxiliary clamping blocks (4) is provided with an auxiliary arc-shaped slot (19) at the radial end close to the axis of the inner support cylinder (2), which is adapted to the outer diameter of the cylindrical clamping rod to be welded; each of the auxiliary clamping blocks (4) is fixed with a helical compression spring (20) at the radial end away from the axis of the inner support cylinder (2), which is parallel to the sliding direction of the auxiliary clamping block (4); the other end of each of the compression springs (20) is fixed to the inner wall of the chamber (5) away from the axis of the inner support cylinder (2); each of the auxiliary clamping blocks (4) has a tendency to slide towards the axis of the inner support cylinder (2) under the elastic repulsion of the compression spring (20).

3. A helix welding fixture for a traveling wave tube power amplifier as defined in claim 2, wherein: The distance adjusting mechanism (10) comprises guide rods (21), guide rings (22) and protrusions (23); each of the auxiliary clamping blocks (4) is fixed with a horizontal guide rod (21) at each of the front and rear ends; each of the outer support cylinders (12) is coaxially fixed with a guide ring (22) at each of the front and rear parts; the outer circumferential wall of the guide ring (22) is fixed with three protrusions (23) at equal angles; the guide rod (21) can be in contact with the outer wall where the outer contour of the protrusion (23) is located under the elastic repulsion of the compression spring (20); when the guide rod (21) is in contact with the outer wall where the outer contour of the protrusion (23) is located, each of the auxiliary clamping blocks (4) is in a state of moving away from each other.

4. A helix welding fixture for a traveling wave tube power amplifier as defined in claim 3, wherein: The distance adjusting mechanism (10) further comprises tension springs (24), contact arc plates (25), guide arc plates (26), through holes (27), sliding frames (28), sliding blocks (29), through grooves (30), butterfly bolts (33), each of the main clamping blocks (3) is fixed with a helical tension spring (24) parallel to the sliding direction of the main clamping block (3) at the radial end away from the axis of the inner supporting cylinder (2), the other end of each of the tension springs (24) is fixed with the inner wall of the chamber (5) where the main clamping block (3) is away from the axis of the inner supporting cylinder (2), each of the main clamping blocks (3) has a tendency to slide away from the axis of the inner supporting cylinder (2) under the elastic tension of the tension spring (24), each of the main clamping blocks (3) is fixed with a contact arc plate (25) at the front and rear ends, each of the outer supporting cylinders (12) is fixed with a guide arc plate (26) at the front and rear parts, the bottom inner wall of the guide arc plate (26) is an upwardly open optimal arc shape coaxial with the inner supporting cylinder (2), and the upper inner wall is a leftward and upward smoothly curved arc shape away from the inner supporting cylinder (2), the contact arc plate (25) can be in contact with the inner arc wall of the guide arc plate (26) under the elastic tension of the tension spring (24), the guide ring (22) is equal in width to the protrusion (23), the width of the guide arc plate (26) is greater than the width of the guide ring (22) and the protrusion (23), the guide ring (22) is fixed with the bottom of the guide arc plate (26), the right upper part of the guide arc plate (26) penetrates the through hole (27) for accommodating the guide rod (21) to pass through, the contact arc plate (25) cannot pass through the through hole (27), the contact arc plates (25) at the front and rear ends of the main clamping block (3) are located in the gap between the front and rear guide rings (22) without being in contact with the guide rings (22), each of the outer supporting cylinders (12) is radially and slidingly connected with a sliding frame (28) at the left lower part and the right lower part, each of the sliding frames (28) is fixed with a sliding block (29) at the front and rear parts, each of the guide rings (22) and the guide arc plates (26) penetrates a notch-shaped through groove (30) at the left and right parts, the sliding block (29) can be matched and combined with the through groove (30) to form a complete guide ring (22) and guide arc plate (26) when the sliding block (29) slides to the middle part of the outer supporting cylinder (12), each of the sliding frames (28) is rotationally connected with a butterfly bolt (33) at the middle part, the butterfly bolt (33) is detachably and threadedly connected with the outer supporting cylinder (12), the guide arc plates (26) at the front and rear ends of the secondary clamping block (4) at the bottom of the inner supporting cylinder (2) are in full contact with the sliding blocks (29) when the second channel (7) is located between the first groove (13) and the second groove (14), the guide arc plates (26) at the front and rear ends of the secondary clamping block (4) at the bottom of the inner supporting cylinder (2) are in full contact with the sliding blocks (29) when the second groove (14) is aligned and communicated with the second channel (7), the guide arc plates (26) at the front and rear ends of the secondary clamping block (4) at the bottom of the inner supporting cylinder (2) are in full contact with the sliding blocks (29) when the third groove (15) is aligned and communicated with the third channel (8).

5. A helix welding fixture for a traveling wave tube power amplifier as defined in claim 4, wherein: The outer supporting barrel (12) is penetrated by a discharge port (34), the inner supporting barrel (2) can make the discharge port (34) align with the third channel (8) when it rotates to a certain angle, the two main clamping blocks (3) align with the two sliding frames (28) when the discharge port (34) aligns with the third channel (8), and the contact arc plates (25) on the main clamping blocks (3) are fully contacted with the sliding blocks (29), the main clamping blocks (3) where the contact arc plates (25) are located can move under the elastic pulling force of the pulling spring (24) and the pushing force of the sliding block (29) when the contact arc plates (25) are fully contacted with the sliding blocks (29) and the sliding frames (28) reciprocate radially, the width of the discharge port (34) and the width of the third channel (8) are both greater than the sum of the outer diameter of the helical line to be welded and the outer diameter of the two clamping rods.

6. A helix welding fixture for a traveling wave tube power amplifier according to any one of claims 3-5, characterized in that: The mechanical rotary driving mechanism (17) comprises a supporting seat (35), a supporting shaft (36), a gear (37), a worm wheel (38), a worm (39), a regular hexagonal prism (40) and an outer gear ring (41), the outer supporting barrel (12) is fixed with the supporting seat (35) on the left part, the supporting seat (35) is rotationally connected with the supporting shaft (36) in the front-rear direction, the rear end of the supporting shaft (36) is coaxially fixed with the gear (37), and the front end is coaxially fixed with the worm wheel (38), the front part of the supporting seat (35) is rotationally connected with the vertical worm (39), the top end of the worm (39) is coaxially fixed with the regular hexagonal prism (40), the worm (39) is engaged with the worm wheel (38), and the front part of the inner supporting barrel (2) is coaxially fixed with the outer gear ring (41), the outer gear ring (41) is engaged with the gear (37).

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