Positioning and crimping device for PMT sealant pouring in mass production stage

Abstract

The utility model discloses a positioning and crimping device for PMT sealant pouring in a mass production stage, which comprises a bottom supporting plate, a tool base is arranged on the upper side of the bottom supporting plate, an inner hexagonal countersunk head screw is arranged between the tool base and the bottom supporting plate, and the tool base is connected with the bottom supporting plate. A second supporting positioning pin and a first supporting positioning pin are arranged on the upper side of the tool base, a pipe base positioning plate is arranged at the upper end of the second supporting positioning pin and the upper end of the first supporting positioning pin, four screws are arranged on the upper side of the pipe base positioning plate, and pipe base pressing plates are arranged on the outer sides of the upper ends of the screws. Through the arrangement of the pipe base positioning plate, the pipe base pressing plate, the first supporting positioning pin, the second supporting positioning pin, the screw, the compression spring and the rotary knob, the supporting positioning pins of different lengths and the pipe base positioning plates of different sizes are used for adapting to different types of PMT pipes, the fixing rotary knob capable of being repeatedly positioned is used for determining the final positioning height, hard limiting of the pipe base pressing plate is provided, and the positioning precision of the PMT pipes is improved. And the PMT tube to be crimped is prevented from being damaged.

Description

TECHNICAL FIELD

[0001] The utility model relates to nuclear medicine technical field especially relates to a kind of positioning pressure bonding device for PMT pouring sealant in production stage. BACKGROUND

[0002] PMT tube, i.e. photomultiplier tube, is a kind of high-sensitivity photoelectric detection device, mainly used for detecting weak light signal. Its working principle is based on photoelectric effect and secondary electron multiplication effect, and the original photoelectric signal is amplified through multi-stage electron multiplication system, so as to realize effective detection of extremely weak light signal.

[0003] The traditional PMT glue pouring positioning mode is roughly as follows: the tube base behind PMT tube and light shield are used as the support for glue pouring; a heavy object is pressed on the light shield of tube base, and the size of pressure is determined by the mass of heavy object. The disadvantages of traditional method are as follows: after silica gel solidification, the height difference of PMT is large, which causes trouble for subsequent process, and the heavy object needs to be held carefully when being pressed, otherwise the optical glass surface in front of PMT will be damaged. SUMMARY

[0004] In order to overcome the deficiencies of prior art, one of the purposes of the utility model is to provide a positioning pressure bonding device for PMT pouring sealant in production stage.

[0005] One of the purposes of the utility model is achieved by adopting the following technical scheme: a positioning pressure bonding device for PMT pouring sealant in production stage, comprising: a bottom support plate, a tool base is arranged on the upper side of the bottom support plate, an internal hexagonal countersunk head screw is arranged between the tool base and the bottom support plate, a support positioning pin two and a support positioning pin one are arranged on the upper side of the tool base, a tube base positioning plate is arranged on the upper end of the support positioning pin two and the support positioning pin one, four screw rods are arranged on the upper side of the tube base positioning plate, a tube base pressing plate is arranged on the outer side of the upper end of the screw rod, a knob is arranged on the outer side of the upper end of the screw rod penetrating through the upper side of the tube base pressing plate, and a compression spring is arranged between the tube base pressing plate and the tube base positioning plate and outside the screw rod.

[0006] According to the positioning pressure bonding device for PMT pouring sealant in production stage, a linear bearing seat is arranged on the upper side of the tube base positioning plate, a guide rod is fixedly connected to the upper side of the linear bearing seat, the guide rod is slidably connected with the tube base pressing plate, and a flat washer two is arranged on the outer side of the upper end of the guide rod.

[0007] According to the positioning pressure bonding device for PMT pouring sealant in production stage, the knob is threadedly connected with the screw rod.

[0008] According to the positioning and pressing device for the PMT sealing glue filling in the mass production stage, the inner hexagonal cylindrical head screw is arranged between the support positioning pin two, the support positioning pin one and the tube base positioning plate, and the flat washer one is arranged between the inner hexagonal cylindrical head screw and the tube base positioning plate.

[0009] According to the positioning and pressing device for the PMT sealing glue filling in the mass production stage, the tube base pressing plate is provided with a plurality of silica gel rings on the lower side.

[0010] According to the positioning and pressing device for the PMT sealing glue filling in the mass production stage, the support positioning pin two, the support positioning pin one and the tool base are all provided with the positioning cap.

[0011] According to the positioning and pressing device for the PMT sealing glue filling in the mass production stage, the nut is arranged on the outer side of the screw rod and on the upper side of the tube base positioning plate.

[0012] Beneficial effects:

[0013] By arranging the tube base positioning plate, the tube base pressing plate, the support positioning pin one, the support positioning pin two, the screw rod, the compression spring and the knob, different lengths of the support positioning pin and different sizes of the tube base positioning plate are used to adapt to different models of the PMT tube, the fixed knob with the repeated positioning function is used to determine the final positioning height, and the hard limit of the tube base pressing plate is provided to prevent the damage of the PMT tube to be pressed.

[0014] Additional aspects and advantages of the present application will be further described in the following description, some of which will become apparent to those skilled in the art from the following description, or will be learned by practice of the present application. BRIEF DESCRIPTION OF DRAWINGS

[0015] The present application will be further described below in combination with the drawings and examples.

[0016] Figure 1 It is a whole three-dimensional structure diagram of the positioning and pressing device for the PMT sealing glue filling in the mass production stage of the present application.

[0017] Figure 2 It is an exploded view of the positioning and pressing device for the PMT sealing glue filling in the mass production stage of the present application.

[0018] Legend:

[0019] 1, support positioning pin one; 2, knob; 3, compression spring; 4, linear bearing seat; 5, guide rod; 6, silica gel ring; 7, bottom support plate; 8, tool base; 9, positioning cap; 10, tube base positioning plate; 11, tube base pressing plate; 12, support positioning pin two; 13, inner hexagonal cylindrical head screw; 16, inner hexagonal countersunk head screw; 17, flat washer one; 18, flat washer two; 19, nut; 20, screw rod. Detailed Implementation

[0020] This section will describe in detail the specific embodiments of the present utility model. The preferred embodiments of the present utility model are shown in the accompanying drawings. The purpose of the drawings is to supplement the textual description with graphics, so that people can intuitively and vividly understand each technical feature and the overall technical solution of the present utility model, but they should not be construed as limiting the scope of protection of the present utility model.

[0021] Reference Figure 1 - Figure 2 A positioning and pressing device for PMT sealant filling in the mass production stage includes: a bottom support plate 7, a tooling base 8 on the upper side of the bottom support plate 7, a countersunk hexagon screw 16 between the tooling base 8 and the bottom support plate 7, a second support positioning pin 12 and a first support positioning pin 1 on the upper side of the tooling base 8, a pipe base positioning plate 10 at the upper end of the second support positioning pin 12 and the first support positioning pin 11, four screws 20 on the upper side of the pipe base positioning plate 10, a pipe base pressure plate 11 on the outer side of the upper end of the screws 20, the upper end of the screws 20 passing through the upper side of the pipe base pressure plate 11 and having a knob 2 on its outer side, and a compression spring sleeved between the pipe base pressure plate 11 and the pipe base positioning plate 10 and on the outer side of the screws 20. 3. A linear bearing seat 4 is provided on the upper side of the pipe base positioning plate 10. A guide rod 5 is fixedly connected to the upper side of the linear bearing seat 4. The guide rod 5 is slidably connected to the pipe base pressure plate 11. A flat washer 18 is provided on the outer side of the upper end of the guide rod 5. The knob 2 is threadedly connected to the screw 20. A hexagonal head screw 13 is provided between the support positioning pin 12, the support positioning pin 1 and the pipe base positioning plate 10. A flat washer 17 is provided between the hexagonal head screw 13 and the pipe base positioning plate 10. A positioning cap 9 is provided between the support positioning pin 12, the support positioning pin 1 and the tooling base 8. A nut 19 is provided on the outer side of the screw 20 and on the upper side of the pipe base positioning plate 10. Multiple silicone rings 6 are provided on the lower side of the pipe base pressure plate 11.

[0022] After the PMT tube base is installed, non-flowing black silicone rubber is injected into the upper circular hole of the tube base to fill the space between the tube base and the PMT. This serves the following purposes: the black silicone rubber prevents visible light from entering through the gaps behind the PMT tube and damaging the internal electrodes of the PMT; it also solidifies the tube base and the PMT into a whole, preventing stress concentration on the soft wire behind the PMT during production operations, which could cause air leakage at the PMT soft wire outlet and damage the PMT tube.

[0023] After the PMT tube is filled with glue, a batch of six PMTs is loaded into six grooves in the tool base 8, two support positioning pins 12 and one support positioning pin 1 determine the spacing of the tube base positioning plate 10 and the tool base 8, which determines the total height of the PMT after the glue is cured. Cover the tube base pressing plate 11, provide fixation and pressure by tightening the four knobs 2, two compression springs 3 provide buffering to prevent accidental pressure from crushing the PMT, and the set silicone ring 6 provides buffering. After the silicone rubber solidifies, the tube base pressing plate 11 and the tube base positioning plate 10 are removed in turn, and the PMT is taken out for the next process.

[0024] Working principle: In use, after the PMT tube is installed on the tube base, the PMT tube is placed in the groove on the tool base 8, and the tube base positioning plate 10 is installed through the support positioning pin 12 and the support positioning pin 1. The height of the support positioning pin 12 and the support positioning pin 1 determines the total height of the PMT after the glue is cured. Then install the tube base pressing plate 11, and rotate the four knobs 2 to make the tube base pressing plate 11 provide pressure. Two compression springs 3 provide buffering to prevent accidental pressure from crushing the PMT. After the silicone rubber solidifies, the tube base pressing plate 11 and the tube base positioning plate 10 are removed in turn, and the PMT is taken out for the next process.

[0025] The above describes the embodiments of the present application in detail in combination with the drawings, but the present application is not limited to the above embodiments. Within the scope of knowledge possessed by those skilled in the art, various changes can be made without departing from the spirit of the present application.

Claims

1. A positioning and crimping device for mass production stage PMT potting sealant, characterized in that, The utility model relates to a kind of pipe base positioning device, including: Bottom support plate (7), the upper side of bottom support plate (7) is provided with tool base (8), and internal hex socket head screw (16) is provided between tool base (8) and bottom support plate (7), the upper side of tool base (8) is provided with support positioning pin two (12) and support positioning pin one (1), the upper end of support positioning pin two (12) and support positioning pin one (1) is provided with pipe base positioning plate (10), the upper side of pipe base positioning plate (10) is provided with four screw rods (20), the outer side of the upper end of screw rod (20) is provided with pipe base pressing plate (11), and the upper end of screw rod (20) passes through the upper side of pipe base pressing plate (11) and is provided with knob (2) outside, and compression spring (3) is sleeved outside screw rod (20) between pipe base pressing plate (11) and pipe base positioning plate (10).

2. A positioning and pressing device for mass production stage PMT sealant filling according to claim 1, characterized in that, The upper side of the pipe base positioning plate (10) is provided with a linear bearing seat (4), and the upper side of the linear bearing seat (4) is fixedly connected with a guide rod (5). The guide rod (5) is in sliding connection with the pipe base pressing plate (11). The outer side of the upper end of the guide rod (5) is provided with a flat washer two (18).

3. A positioning and pressing device for mass production stage PMT sealant filling according to claim 1, characterized in that, The knob (2) is in threaded connection with the screw rod (20).

4. The positioning and pressing device for the quantity production stage PMT sealant filling according to claim 1, characterized in that, The support positioning pin two (12), the support positioning pin one (1) and the pipe base positioning plate (10) are provided with an internal hexagonal cylindrical head screw (13) therebetween. The internal hexagonal cylindrical head screw (13) and the pipe base positioning plate (10) are provided with a flat washer one (17) therebetween.

5. The positioning and pressing device for the quantity production stage PMT sealant filling according to claim 1, characterized in that, The lower side of the pipe base pressing plate (11) is provided with a plurality of silica gel rings (6).

6. A positioning and pressing device for mass production stage PMT sealant filling according to claim 1, characterized in that, The support positioning pin two (12), the support positioning pin one (1) and the tool base (8) are provided with a positioning cap (9) therebetween.

7. A positioning and pressing device for mass production stage PMT sealant filling according to claim 1, characterized in that, The outer side of the screw rod (20) and the upper side of the pipe base positioning plate (10) are provided with a nut (19).

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