Efficient photochemical reaction device

Abstract

The invention discloses an efficient photochemical reaction device, and relates to the technical field of photochemical reaction, the efficient photochemical reaction device comprises a box body, LED light sources and a reaction support, the lower end of the box body is provided with a reaction box, an equipment box is arranged above the reaction box, the reaction box is internally provided with two LED light sources, and the reaction support is arranged between the two LED light sources; the lower end of the LED light source is connected with a limiting clamping block of the reaction box in a clamping mode through a base, a movable clamping block is arranged on one side of the limiting clamping block, the LED light source is fixed through the limiting clamping block and the movable clamping block, light sources with different wavelengths are convenient to install and replace, a plurality of positioning columns are arranged on the two sides of the reaction support, and the reaction guide pipes are wound on the outer sides of the positioning columns. A reaction solution flows in the reaction conduit, a photochemical reaction experiment can be carried out on the basis of less reaction solution, and the reaction can be carried out efficiently, stably and safely by continuously outputting single light-emitting wavelength and LED light with higher light intensity and light stability through the LED light source.

Description

Technical Field

[0001] The invention relates to the technical field of photochemical reaction, in particular to a high-efficiency photochemical reaction device. Background Art

[0002] Chemical synthesis experiments are experiments that use chemical reactions that occur under light conditions to synthesize chemical substances. Photochemical reactions usually involve molecules absorbing light energy, putting them in an excited state, and then initiating chemical reactions. Photochemical synthesis is widely used in organic synthesis, materials science, environmental protection and other fields, especially in green chemistry and sustainable chemical reactions.

[0003] At present, photochemical synthesis around the world has the problem of large liquid consumption, resulting in a large amount of waste liquid, which is difficult to handle and affects the sustainable development of the environment. The attenuation of the light source in the photochemical reactor is particularly significant, because the experiment often needs to be carried out under continuous or high-intensity lighting conditions, which places extremely high requirements on the stability and durability of the light source. The attenuation of the light source not only directly affects the energy input of the reaction system, but also may change the distribution and spectral characteristics of photons, thereby triggering a series of chain reactions, and ultimately affecting the accuracy and repeatability of the experimental results. Therefore, an efficient photochemical reaction device is proposed to solve the above problems. Summary of the invention

[0004] In order to solve the above technical problems, an efficient photochemical reaction device is provided. This technical solution solves the problem that the attenuation of the light source in the photochemical reactor changes the distribution and spectral characteristics of photons, affecting the accuracy and repeatability of the experimental results.

[0005] In order to achieve the above purpose, the technical solution adopted by the present invention is:

[0006] An efficient photochemical reaction device comprises a box, an LED light source and a reaction bracket, wherein a reaction box is arranged at the lower end of the box, an equipment box is arranged above the reaction box, two LED light sources are installed inside the reaction box, the two LED light sources are arranged opposite to each other, a reaction bracket is arranged between the two LED light sources, the LED light source is used to provide the light source required for the reaction, a light source control unit and a detection unit are installed inside the equipment box, the light source control unit is electrically connected to the LED light source, and the light source control unit is used to drive and control the LED light source;

[0007] The reaction bracket is arranged in a U shape, and a plurality of positioning columns are fixedly connected to both sides of the reaction bracket, and the plurality of positioning columns are arranged in an array, and a reaction conduit is wound around the outer side of the positioning column, and a slot corresponding to the reaction bracket is provided at the bottom of the box body, and the lower end of the reaction bracket is connected to the bottom of the reaction box through the slot;

[0008] The LED light source includes a light source support frame, a cooling assembly, a light emitting plate and a base, wherein a plurality of LED lamp beads are arranged inside the light source support frame, the cooling assembly is fixedly connected to one side of the light source support frame, the cooling assembly is used to dissipate heat for the LED lamp beads, the light emitting plate is arranged on the other side of the light source support frame, the base is fixedly connected to the lower end of the light source support frame, a plurality of limit blocks are fixedly connected to the bottom of the reaction box, grooves are provided on opposite sides of the limit blocks, the limit blocks are clamped with one end of the base through the grooves, a movable block is arranged on one side of the limit block, the lower end of the movable block is slidably connected to the reaction box, one side of the movable block is clamped with the inner wall of the other end of the base, a liquid inlet joint is arranged on one side of the cooling assembly, a liquid outlet joint is arranged above the liquid inlet joint, and the liquid inlet joint and the liquid outlet joint are both connected to the cooling pipe inside the light source support frame.

[0009] Preferably, a light intensity sensor is installed on the top inner wall of the reaction box, and the light intensity sensor is electrically connected to the detection unit. A temperature sensor is provided on one side of the light intensity sensor, and the temperature sensor is installed on the top inner wall of the reaction box, and the temperature sensor is electrically connected to the detection unit.

[0010] Preferably, a touch operation display screen is installed at the front end of the equipment box, a power switch is provided on one side of the touch operation display screen, a light source switch is provided below the power switch, and the light source switch is electrically connected to the light source control unit.

[0011] Preferably, a front box door is provided at the front end of the reaction box, one side of the front box door is rotatably connected to the reaction box via a hinge, an observation window is provided in the middle of the front box door, and a door lock is provided on one side of the observation window.

[0012] Preferably, cooling fans are installed on both inner walls of the reaction box and the equipment box, and the cooling fans are used to dissipate heat inside the reaction box and the equipment box.

[0013] Preferably, a rear door is provided at the rear end of the reaction box, one side of the rear door is rotatably connected to the reaction box via a hinge, and a door handle is installed on the surface of the rear door.

[0014] Preferably, a coolant inlet is provided at the rear end of the reaction box, a coolant outlet is provided below the coolant inlet, one end of the coolant inlet is connected to the liquid inlet joint through a pipe, one end of the coolant outlet is connected to the liquid outlet joint through a pipe, and the other end of the coolant inlet and the coolant outlet is connected to an external circulating water tank.

[0015] Preferably, a reaction liquid inlet is provided at the rear end of the reaction box, the reaction liquid inlet is arranged below the cooling liquid outlet, and a reaction liquid outlet is arranged below the reaction liquid inlet.

[0016] Preferably, a conduit inlet is provided at one end of the reaction conduit, and a conduit outlet is provided at the other end of the reaction conduit, the conduit inlet is communicated with one end of the reaction liquid inlet, and the conduit outlet is communicated with one end of the reaction liquid outlet.

[0017] Preferably, a handle is provided on the top of the equipment box, and both ends of the handle are rotatably connected to grooves provided on the top of the equipment box.

[0018] Compared with the prior art, the present invention has the following beneficial effects:

[0019] 1. The device is provided with an LED light source, the lower end of the LED light source is connected to the bottom of the reaction box through a base, a plurality of limit blocks are provided at the bottom of the reaction box, grooves are provided on opposite sides of the limit blocks, the limit blocks are connected to one end of the base through the grooves, and the base is also limited by the limit blocks, a movable block is provided on one side of the limit block, the lower end of the movable block can slide along the reaction box, one side of the movable block is connected to the inner wall of the other end of the base, the LED light source is fixed to the bottom of the reaction box by the limit block and the movable block, and it is also convenient to install and replace LED light sources with different wavelengths, and to replace the corresponding light source according to experimental needs. The LED light source dissipates heat through water cooling to improve the heat dissipation efficiency.

[0020] 2. The device is provided with a reaction bracket between two groups of LED light sources. The lower end of the reaction bracket is connected to the bottom of the reaction box through a card slot, which is convenient for fixing the reaction bracket. Multiple positioning columns are provided on both sides of the reaction bracket. The reaction conduit is wrapped around the outer side of the positioning column. The reaction solution flows inside the reaction conduit. The reaction solution reacts under the illumination of the LED light sources on both sides. Photochemical reaction experiments can be carried out on the basis of less reaction solution. The LED light source continuously outputs a single luminous wavelength, and the LED light with higher light intensity and photostability enables the reaction to be carried out efficiently, stably and safely.

[0021] 3. In this device, a light intensity sensor and a temperature sensor are installed inside the reaction box. Both the light intensity sensor and the temperature sensor are electrically connected to the detection unit in the equipment box. The light intensity sensor monitors whether the light intensity inside the reaction box changes. If the light intensity change exceeds a threshold, the detection unit sends out an alarm to prevent the light intensity change from affecting the reaction. The temperature inside the reaction box is monitored by the temperature sensor. When the temperature exceeds the threshold, the detection unit sends out an alarm to prevent the reaction from being affected by excessively high temperature. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1It is a schematic diagram of the overall structure of the present invention;

[0023] Figure 2 It is a schematic diagram of the internal structure of the reaction box in the present invention;

[0024] Figure 3 It is a schematic diagram of the internal structure of the equipment box in the present invention;

[0025] Figure 4 A schematic diagram of the internal structure of the device box of the present invention from another perspective;

[0026] Figure 5 It is a schematic diagram of the structure of the LED light source and the reaction bracket in the present invention;

[0027] Figure 6 It is a structural schematic diagram of the LED light source and the reaction bracket in another perspective of the present invention;

[0028] Figure 7 It is a rear view structural schematic diagram of the present invention.

[0029] The numbers in the figure are:

[0030] 1. Box body; 11. Reaction box; 111. Light intensity sensor; 112. Temperature sensor; 113. Limiting card block; 114. Moving card block; 115. Card slot; 12. Equipment box; 121. Touch operation display screen; 122. Power switch; 123. Light source switch; 124. Handle; 125. Light source control unit; 126. Detection unit; 13. Front box door; 131. Observation window; 132. Door lock; 14. Cooling fan; 15. Rear box door; 151. Box door handle; 161. Coolant inlet; 162. Coolant outlet; 171. Reaction liquid inlet; 172. Reaction liquid outlet;

[0031] 2. LED light source; 21. Light source support frame; 22. Cooling assembly; 23. Light scattering plate; 24. Base; 25. Liquid inlet connector; 26. Liquid outlet connector;

[0032] 3. Reaction support; 31. Positioning column; 32. Reaction catheter; 321. Catheter inlet; 322. Catheter outlet. DETAILED DESCRIPTION

[0033] For example, certain words are used in the specification and claims to refer to specific components. Those skilled in the art should understand that hardware manufacturers may use different terms to refer to the same component. This specification and claims do not use differences in names as a way to distinguish components, but use differences in the functions of components as the criteria for distinction. As mentioned throughout the specification and claims, "including" is an open term, so it should be interpreted as "including but not limited to". The subsequent description of the specification is a preferred embodiment of implementing the present application, but the description is for the purpose of illustrating the general principles of the present application, and is not used to limit the scope of the present application. The scope of protection of the present application shall be determined by the definition of the attached claims.

[0034] like Figure 1-7 As shown, a high-efficiency photochemical reaction device includes a box body 1, an LED light source 2 and a reaction bracket 3. A reaction box 11 is arranged at the lower end of the box body 1, and an equipment box 12 is arranged above the reaction box 11. Two LED light sources 2 are installed inside the reaction box 11, and the two LED light sources 2 are arranged opposite to each other. A reaction bracket 3 is arranged between the two LED light sources 2. The LED light source 2 is used to provide the light source required for the reaction. A light source control unit 125 and a detection unit 126 are installed inside the equipment box 12. The light source control unit 125 is electrically connected to the LED light source 2. The light source control unit 125 is used to drive and control the LED light source 2. A handle 124 is arranged on the top of the equipment box 12. Both ends of the handle 124 are rotatably connected to the grooves opened on the top of the equipment box 12. After the handle 124 is rotated to lift the handle 124, the box body 1 can be lifted as a whole by the handle 124, which is convenient for taking and moving.

[0035] like Figure 5 and 6 As shown, the reaction bracket 3 is arranged in a U shape, and multiple positioning columns 31 are fixedly connected to both sides of the reaction bracket 3, and the multiple positioning columns 31 are arranged in an array. The reaction conduit 32 is wrapped around the outer side of the positioning column 31, and a reaction solution flows inside the reaction conduit 32. The reaction solution reacts under the illumination of the LED light sources 2 on both sides. The reaction time is adjusted by controlling the flow rate of the solution in the reaction conduit 32, and a photochemical reaction experiment can be carried out on the basis of less reaction solution. The reaction conduit 32 is made of FEP or PFA material, and a card slot 115 corresponding to the reaction bracket 3 is opened at the bottom of the box body 1. The lower end of the reaction bracket 3 is card-connected with the bottom of the reaction box 11 through the card slot 115, so that the reaction bracket 3 can be conveniently taken.

[0036] Among them, the LED light source 2 includes a light source support frame 21, a cooling component 22, a light scattering plate 23 and a base 24. A plurality of LED lamp beads are arranged inside the light source support frame 21. The wavelength of the light source can be selected from 200nn-1500nm. The cooling component 22 is fixedly connected to one side of the light source support frame 21. The cooling component 22 is used to dissipate heat for the LED lamp beads. The light scattering plate 23 is arranged on the other side of the light source support frame 21. The light emitted by the LED lamp beads becomes uniform after passing through the light scattering plate 23, so that the reaction solution in the reaction conduit 32 is evenly illuminated, so that the photochemical reaction proceeds evenly. The base 24 is fixedly connected to the lower end of the light source support frame 21. A plurality of limiting blocks 113 are fixedly connected to the bottom of the reaction box 11. Grooves are provided on the opposite sides of the limiting blocks 113. The limiting blocks 113 are clamped with one end of the base 24 through the grooves. At the same time, the base 24 is also limited by the limiting blocks 113. A moving block 114 is arranged on one side of the limiting block 113. The lower end of the moving block 114 is connected to the box body. 1 is slidably connected, one side of the moving card block 114 is snap-fitted with the inner wall of the other end of the base 24, and the LED light source 2 is fixed to the bottom of the reaction box 11 through the limiting card block 113 and the moving card block 114, which is also convenient for installing and replacing the LED light source 2 with different light source wavelengths. A liquid inlet connector 25 is provided on one side of the cooling component 22, and a liquid outlet connector 26 is provided above the liquid inlet connector 25. The liquid inlet connector 25 and the liquid outlet connector 26 are both connected to the cooling pipe inside the light source support frame 21. The cooling component 22 The heat generated when the LED lamp beads emit light is absorbed by the coolant to avoid the LED light source 2 from being too hot. A coolant inlet 161 is provided at the rear end of the reaction box 11, and a coolant outlet 162 is provided below the coolant inlet 161. One end of the coolant inlet 161 is connected to the liquid inlet joint 25 through a pipeline, and one end of the coolant outlet 162 is connected to the liquid outlet joint 26 through a pipeline. The other ends of the coolant inlet 161 and the coolant outlet 162 are connected to an external circulating water tank.

[0037] Please refer to Figure 4A light intensity sensor 111 is installed on the top inner wall of the reaction box 11, and the light intensity sensor 111 is electrically connected to the detection unit 126. The model of the light intensity sensor 111 is: BH1750, and other sensors that can achieve the same function are all acceptable. The light intensity sensor 111 is used to monitor whether the light intensity inside the reaction box 11 changes. If the light intensity change exceeds the threshold, the detection unit 126 will sound an alarm to remind the operator to check the lighting conditions of the LED light source 2. A temperature sensor 112 is provided on one side of the light intensity sensor 111. The temperature sensor 112 is installed on the top inner wall of the reaction box 11, and the temperature sensor 112 is electrically connected to the detection unit 126. The model of the limit block 113 is: TIF352U0089, or other sensors that can achieve the same function are all acceptable. The temperature inside the reaction box 11 is monitored by the temperature sensor 112 to prevent the reaction from being affected by excessively high temperature.

[0038] In this embodiment, a touch operation display screen 121 is installed at the front end of the equipment box 12, and the lighting parameters and reaction time, etc. can be displayed and set through the touch operation display screen 121. A power switch 122 is provided on one side of the touch operation display screen 121. The power switch 122 is used to control the total power of the device. A light source switch 123 is provided below the power switch 122. The light source switch 123 is electrically connected to the light source control unit 125. The light source switch 123 is used to control the power on and off of the LED light source 2. A front box door 13 is provided at the front end of the reaction box 11. One side of the front box door 13 is rotatably connected to the reaction box 11 through a hinge. The middle part of the front box door 13 is provided with An observation window 131 is provided with protective glass in the middle thereof, through which the LED light source 2 and the reaction bracket 3 inside the reaction box 11 can be observed, and light leakage can be prevented from causing harm to the eyes of the operator. A door lock 132 is arranged on one side of the observation window 131, and cooling fans 14 are installed on the inner walls on both sides of the reaction box 11 and the equipment box 12. The cooling fans 14 draw external air into the reaction box 11 and the equipment box 12, and discharge the hot air inside the reaction box 11 and the equipment box 12 to dissipate the heat, so as to avoid the influence of excessive temperature on the reaction in the reaction box 11 and the electronic equipment in the equipment box 12.

[0039] A rear door 15 is provided at the rear end of the reaction box 11, one side of the rear door 15 is rotatably connected to the reaction box 11 through a hinge, a door handle 151 is installed on the surface of the rear door 15, a reaction liquid inlet 171 is provided at the rear end of the reaction box 11, the reaction liquid inlet 171 is provided below the coolant outlet 162, a reaction liquid outlet 172 is provided below the reaction liquid inlet 171, a conduit inlet 321 is provided at one end of the reaction conduit 32, a conduit outlet 322 is provided at the other end of the reaction conduit 32, the conduit inlet 321 is communicated with one end of the reaction liquid inlet 171 through a conduit, and the conduit outlet 322 is communicated with one end of the reaction liquid outlet 172, the reaction solution can be sent to the interior of the reaction conduit 32 through the reaction liquid inlet 171 for illumination, and the solution after the reaction is completed is discharged and collected through the reaction liquid outlet 172.

[0040] The principle of the present invention is as follows: when using the photochemical reactor, the reaction conduit 32 is wound around the positioning column 31 and the reaction bracket 3 is inserted into the reaction box 11 through the card slot 115 for fixing, the conduit inlet 321 and the conduit outlet 322 are connected to the reaction liquid inlet 171 and the reaction liquid outlet 172 respectively, then the front box door 13 and the rear box door 15 are closed, the power switch 122 is pressed to turn on the device power, and then the light source switch 123 is pressed to power on the LED light source 2, and the reaction solution is sent to the reaction conduit 32 through the reaction liquid inlet 171 for illumination, and the solution after the reaction is completed is discharged and collected through the reaction liquid outlet 172, and the light intensity and temperature inside the reaction box 11 are detected by the light intensity sensor 111 and the temperature sensor 112. If the light intensity and temperature fluctuations exceed the threshold value, the detection unit 126 will sound an alarm, and the LED light source 2 is cooled by the cooling component 22 inside it, and at the same time, the air inside the reaction box 11 and the equipment box 12 is ventilated and cooled by multiple cooling fans 14 to avoid excessive temperature affecting the reaction.

[0041] The above description is only a specific implementation mode of the present application and is not intended to limit the scope of protection of the present application. For those skilled in the art, the present application may have various modifications and changes. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present application shall be included in the scope of protection of the present application. Any technician familiar with the technical field can easily think of changes or substitutions within the technical scope disclosed in the present application, which should also be included in the scope of protection of the present application. Therefore, the scope of protection of the present application shall be based on the scope of protection of the claims.

[0042] It should be noted that, in this article, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device. In the absence of further restrictions, the elements defined by the sentence "comprise a ..." do not exclude the existence of other identical elements in the process, method, article or device including the elements.

Claims

1. An efficient photochemical reaction device, characterized in that: The invention comprises a box body (1), an LED light source (2) and a reaction support (3), wherein a reaction box (11) is arranged at the lower end of the box body (1), an equipment box (12) is arranged above the reaction box (11), two LED light sources (2) are installed inside the reaction box (11), the two LED light sources (2) are arranged opposite to each other, a reaction support (3) is arranged between the two LED light sources (2), the LED light sources (2) are used to provide light sources required for the reaction, a light source control unit (125) and a detection unit (126) are installed inside the equipment box (12), the light source control unit (125) is electrically connected to the LED light source (2), and the light source control unit (125) is used to drive and control the LED light source (2); The reaction bracket (3) is arranged in a U shape, and a plurality of positioning columns (31) are fixedly connected to both sides of the reaction bracket (3), and the plurality of positioning columns (31) are arranged in an array, and a reaction conduit (32) is wound around the outer side of the positioning column (31), and a clamping groove (115) corresponding to the reaction bracket (3) is provided at the bottom of the box body (1), and the lower end of the reaction bracket (3) is clamped with the bottom of the reaction box (11) through the clamping groove (115); The LED light source (2) comprises a light source support frame (21), a cooling component (22), a light scattering plate (23) and a base (24); a plurality of LED lamp beads are arranged inside the light source support frame (21); the cooling component (22) is fixedly connected to one side of the light source support frame (21); the cooling component (22) is used to dissipate heat for the LED lamp beads; the light scattering plate (23) is arranged on the other side of the light source support frame (21); the base (24) is fixedly connected to the lower end of the light source support frame (21); a plurality of limit blocks (113) are fixedly connected to the bottom of the reaction box (11); the limit blocks (113) ) are provided with grooves on opposite sides, the limiting block (113) is clamped with one end of the base (24) through the groove, a moving block (114) is provided on one side of the limiting block (113), the lower end of the moving block (114) is slidably connected to the reaction box (11), and one side of the moving block (114) is clamped with the inner wall of the other end of the base (24), a liquid inlet connector (25) is provided on one side of the cooling component (22), a liquid outlet connector (26) is provided above the liquid inlet connector (25), and the liquid inlet connector (25) and the liquid outlet connector (26) are both connected to the cooling pipe inside the light source support frame (21).

2. The efficient photochemical reaction device according to claim 1, characterized in that: A light intensity sensor (111) is installed on the top inner wall of the reaction box (11), and the light intensity sensor (111) is electrically connected to the detection unit (126). A temperature sensor (112) is provided on one side of the light intensity sensor (111), and the temperature sensor (112) is installed on the top inner wall of the reaction box (11), and the temperature sensor (112) is electrically connected to the detection unit (126).

3. The efficient photochemical reaction device according to claim 1, characterized in that: A touch operation display screen (121) is installed at the front end of the equipment box (12); a power switch (122) is arranged on one side of the touch operation display screen (121); a light source switch (123) is arranged below the power switch (122); and the light source switch (123) is electrically connected to a light source control unit (125).

4. The efficient photochemical reaction device according to claim 1, characterized in that: A front box door (13) is provided at the front end of the reaction box (11), one side of the front box door (13) is rotatably connected to the reaction box (11) via a hinge, an observation window (131) is provided in the middle of the front box door (13), and a door lock (132) is provided on one side of the observation window (131).

5. The efficient photochemical reaction device according to claim 1, characterized in that: Cooling fans (14) are installed on the inner walls of both sides of the reaction box (11) and the equipment box (12), and the cooling fans (14) are used to dissipate heat inside the reaction box (11) and the equipment box (12).

6. The efficient photochemical reaction device according to claim 1, characterized in that: A rear door (15) is provided at the rear end of the reaction box (11), one side of the rear door (15) is rotatably connected to the reaction box (11) via a hinge, and a door handle (151) is installed on the surface of the rear door (15).

7. The efficient photochemical reaction device according to claim 1, characterized in that: A cooling liquid inlet (161) is provided at the rear end of the reaction box (11), and a cooling liquid outlet (162) is provided below the cooling liquid inlet (161). One end of the cooling liquid inlet (161) is connected to the liquid inlet joint (25) through a pipeline, and one end of the cooling liquid outlet (162) is connected to the liquid outlet joint (26) through a pipeline. The other ends of the cooling liquid inlet (161) and the cooling liquid outlet (162) are connected to an external circulating water tank.

8. The efficient photochemical reaction device according to claim 1, characterized in that: A reaction liquid inlet (171) is provided at the rear end of the reaction box (11). The reaction liquid inlet (171) is arranged below the cooling liquid outlet (162). A reaction liquid outlet (172) is arranged below the reaction liquid inlet (171).

9. The efficient photochemical reaction device according to claim 1, characterized in that: A conduit inlet (321) is provided at one end of the reaction conduit (32), and a conduit outlet (322) is provided at the other end of the reaction conduit (32); the conduit inlet (321) is communicated with one end of the reaction liquid inlet (171), and the conduit outlet (322) is communicated with one end of the reaction liquid outlet (172).

10. The efficient photochemical reaction device according to claim 1, characterized in that: A handle (124) is provided on the top of the equipment box (12), and both ends of the handle (124) are rotatably connected to grooves provided on the top of the equipment box (12).

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