CN111343810A

CN111343810A - Examine and repair convenient refrigerating unit PLC touch screen switch board

Info

Publication number: CN111343810A
Application number: CN201911017590.8A
Authority: CN
Inventors: 董悦串
Original assignee: Xuzhou Sanhe Automatic Control Equipment Co ltd
Current assignee: Xuzhou Sanhe Automatic Control Equipment Co ltd
Priority date: 2020-05-18
Filing date: 2020-05-18
Publication date: 2020-06-26

Abstract

The invention discloses a conveniently maintained PLC touch screen control cabinet of a refrigerating unit, which comprises a shell, a supporting component and an installation component, wherein a top plate is fixedly installed at the top of the shell, the installation component is fixedly installed inside the shell, a line inlet frame is movably installed on the surface of the installation component, heat dissipation components are arranged inside the installation component at equal intervals, fans are fixedly installed on two sides of each heat dissipation component, dustproof components are movably installed on two sides of the shell, a carrying component is fixedly installed at the bottom of each dustproof component, a door body is movably installed on the surface of the shell in a fixed hinge mode, an observation window is fixedly arranged at the bottom of a door lock, a storage groove is fixedly formed in the bottom of the shell, and the supporting component is movably installed at the bottom of the storage groove. The invention realizes that the maintenance tools are stored by using the two drawers in the using process, is convenient for workers to take and use to maintain the device, and ensures the normal use of the device.

Description

Examine and repair convenient refrigerating unit PLC touch screen switch board

Technical Field

The invention relates to the technical field of a refrigeration unit PLC touch screen control cabinet, in particular to a refrigeration unit PLC touch screen control cabinet convenient to overhaul.

Background

The refrigeration compressor unit is the most main equipment in the refrigeration plant, generally called the host computer in the refrigeration plant, and refrigerant vapour improves to high pressure and the continuous flow of vapour, transport from low pressure, all accomplishes with the help of refrigeration compressor's work, and the in-process that the refrigeration compressor unit used needs to use PLC touch screen switch board to accomplish equipment automation and process automation control, realizes perfect network function, characteristics such as stable performance, expandable, anti-interference strong.

Although the prior patent (publication number: CN105323990A) discloses a control cabinet based on air cooling technology, which includes a control cabinet bottom plate, a control cabinet left panel, a control cabinet right panel, a control cabinet rear panel, a control cabinet top plate and a control cabinet door as a front panel, an electrical component mounting plate is further disposed in the control cabinet, the electrical component mounting plate divides the control cabinet into two independent spaces, namely a front space and a rear space, and a heat sink is disposed on the back of the electrical component mounting plate, in the process of implementing the present invention, the inventor finds that at least the following problems in the prior art are not solved: 1. the device is inconvenient for workers to overhaul, and the normal use of the device is affected; 2. the electric equipment is inconvenient for workers to rapidly disassemble and assemble, and the assembling of the workers is affected; 3. the device is inconvenient for workers to install on refrigerating unit equipment, and the use of the device by the workers is affected; 4. the heat dissipation mode is single, causes the rapid aging of electrical equipment. Therefore, the invention designs an instrument which can adjust the strength, can train the single part of the body at the same time and is convenient to disassemble.

Disclosure of Invention

The invention aims to solve the defects in the prior art, such as: the current convenient refrigerator unit PLC touch screen switch board of maintenance overhauls the in-process that uses, and inconvenient staff overhauls the device, influences the normal use of device, and inconvenient staff carries out quick assembly disassembly to electrical equipment in addition, influences the staff and assembles, also does not make things convenient for the staff to install this device on refrigerator unit equipment, influences the staff and uses, and the radiating mode is single, causes electrical equipment's quick ageing.

In order to achieve the purpose, the invention adopts the following technical scheme:

a refrigeration unit PLC touch screen control cabinet convenient to overhaul comprises a shell, a supporting assembly and an installation assembly, wherein a top plate is fixedly installed at the top of the shell, the installation assembly is fixedly installed inside the shell, a wire inlet frame is movably installed on the surface of the installation assembly, heat dissipation assemblies are arranged inside the installation assembly at equal intervals, fans are fixedly installed on two sides of each heat dissipation assembly, dustproof assemblies are movably installed on two sides of the shell, and carrying assemblies are fixedly installed at the bottoms of the dustproof assemblies;

the fixed surface hinge movable mounting of casing has a body, the fixed surface of the body is provided with the lock, the fixed observation window that is provided with in bottom of lock, the fixed storage tank that is provided with in bottom of casing, the bottom movable mounting of storage tank has supporting component.

Preferably, the top of the top plate is equidistantly provided with heat dissipation fins, and both sides of the heat dissipation fins are fixedly provided with hooks.

Preferably, both sides of the shell are fixedly provided with guide bases, and one side of each guide base is fixedly provided with a wire connecting pipe.

Preferably, the carrying assembly comprises a fixing groove, fixing bolts are movably mounted on two sides of the fixing groove, a handle is movably mounted inside the fixing groove, and an anti-skid sleeve is fixedly arranged on the surface of the handle.

Preferably, the storage groove is fixedly provided with a partition plate inside, and both sides of the partition plate are movably provided with drawers.

Preferably, the supporting component comprises a mounting frame, bolt holes are formed in the mounting frame at equal intervals, and reinforcing rods are fixedly mounted on two sides of the mounting frame.

Preferably, the surface equidistance of the door body is provided with the instrument window, the bottom equidistance of instrument window is provided with the switch hole, the bottom in switch hole is provided with the through-hole, and the both sides equidistance of through-hole is provided with the mounting hole.

Preferably, the mounting assembly comprises a fixing frame, first limiting holes are formed in the surface of the second limiting holes at equal intervals, connecting rods are movably mounted between the fixing frames through connecting bolts, and second limiting holes are formed in the surface of the connecting rods at equal intervals.

Preferably, the heat dissipation assembly comprises a heat dissipation plate, and heat dissipation pads are arranged on the surface of the heat dissipation plate at equal intervals.

Preferably, the dustproof assembly comprises a dustproof cover, the surface of the dustproof cover is movably provided with a positioning rod, and the surface of the positioning rod is movably provided with a positioning bolt.

Compared with the prior art, the invention has the beneficial effects that:

1. according to the invention, the storage groove is fixedly arranged at the bottom of the shell, so that the maintenance tools can be stored by utilizing the two drawers, the maintenance of the device can be conveniently carried out by taking and using the device by workers, and the normal use of the device is ensured.

2. According to the invention, the mounting assembly is fixedly mounted in the shell, the connecting rod can be mounted by matching the first limiting hole with the connecting bolt, and then the electrical equipment is mounted by matching the second limiting hole with the screw, so that the mounting and dismounting are simple, and the assembly by workers is convenient.

3. According to the invention, the supporting assembly is movably arranged at the bottom of the storage groove, the device can be arranged on the refrigerating unit by utilizing the bolt holes and the screws, and then the device is reinforced by utilizing the reinforcing rods, so that the strength of the device is improved, and the use by workers is facilitated.

4. According to the invention, the top plate is fixedly arranged at the top of the shell, so that the heat dissipation area can be increased by using the heat dissipation fins, the heat dissipation effect is good, and the position of the device can be conveniently adjusted by workers by using the hooks.

5. According to the invention, the heat dissipation assemblies are equidistantly arranged in the mounting assembly, the heat dissipation pad is made of heat dissipation silica gel, high-flexibility materials can be used, the pressure required between the components can be reduced, and the microscopically uneven surface is covered, so that the components are fully contacted, the heat conduction efficiency is improved, the heat dissipation device is particularly suitable for the heat conduction requirement with limited space, the heat dissipation efficiency is further improved, and the electrical equipment is prevented from aging.

Drawings

Fig. 1 is a perspective view of a PLC touch screen control cabinet of a refrigerating unit, which is convenient and fast to overhaul and is provided by the invention;

fig. 2 is a schematic structural diagram of a refrigeration unit PLC touch screen control cabinet convenient to overhaul according to the present invention;

FIG. 3 is a front view of a PLC touch screen control cabinet of a refrigeration unit, which is convenient and fast to overhaul, according to the present invention;

FIG. 4 is a side view of a PLC touch screen control cabinet of a refrigeration unit, which is convenient and fast to overhaul, according to the present invention;

FIG. 5 is a schematic structural view of a local part of a PLC touch screen control cabinet installation component of a refrigeration unit, which is convenient and fast to overhaul and is provided by the invention;

FIG. 6 is a schematic structural diagram of a local part of a PLC touch screen control cabinet carrying assembly of the refrigerating unit, which is convenient and fast to overhaul and provided by the invention;

fig. 7 is a schematic structural diagram of a local part of a heat dissipation assembly of a PLC touch screen control cabinet of a refrigeration unit, which is convenient and fast to overhaul.

In the figure: 1. a top plate; 101. hooking; 102. heat dissipation fins; 2. a housing; 201. a guide seat; 202. a wire connecting pipe; 3. a carrying assembly; 301. fixing grooves; 302. a fixing bolt; 303. a handle; 304. an anti-slip sleeve; 4. a storage tank; 401. a partition plate; 402. a drawer; 5. a support assembly; 501. a mounting frame; 502. a reinforcing rod; 503. bolt holes; 6. a door body; 601. an instrument window; 602. a switch hole; 603. a through hole; 604. mounting holes; 7. a door lock; 8. an observation window; 9. mounting the component; 901. a connecting rod; 902. a fixed mount; 903. a connecting bolt; 904. a first limit hole; 905. a second limiting hole; 10. a fan; 11. a heat dissipating component; 1101. a heat dissipation plate; 1102. a heat dissipation pad; 12. a wire inlet frame; 13. a dust-proof assembly; 1301. positioning a rod; 1302. a dust cover; 1303. and (4) positioning the bolt.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments.

In the description of the present invention, it is to be understood that the terms "upper", "lower", "front", "rear", "left", "right", "top", "bottom", "inner", "outer", and the like, indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, are merely for convenience in describing the present invention and simplifying the description, and do not indicate or imply that the device or element being referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus, should not be construed as limiting the present invention.

Referring to fig. 1-7, a refrigeration unit PLC touch screen control cabinet convenient to overhaul comprises a shell 2, a supporting component 5 and a mounting component 9, wherein a top plate 1 is fixedly mounted at the top of the shell 2, the mounting component 9 is fixedly mounted in the shell 2, a wire inlet frame 12 is movably mounted on the surface of the mounting component 9, heat dissipation components 11 are equidistantly arranged in the mounting component 9, fans 10 are fixedly mounted on two sides of each heat dissipation component 11, dustproof components 13 are movably mounted on two sides of the shell 2, and carrying components 3 are fixedly mounted at the bottoms of the dustproof components 13;

a door body 6 is movably mounted on the surface fixing hinge of the shell 2, a door lock 7 is fixedly arranged on the surface of the door body 6, an observation window 8 is fixedly arranged at the bottom of the door lock 7, a storage groove 4 is fixedly arranged at the bottom of the shell 2, and a supporting component 5 is movably mounted at the bottom of the storage groove 4.

When the device works, the heat dissipation area is increased by using the heat dissipation fins 102, the heat dissipation effect is good, the hooks 101 are recycled to facilitate the position adjustment of the device by workers, the first limiting holes 904 are matched with the connecting bolts 903 to install the connecting rods 901, the second limiting holes 905 are matched with screws to install electrical equipment, the disassembly and the assembly are simple, the assembly by workers is facilitated, the wires are orderly arranged by using the wire inlet frame 12 to facilitate the maintenance work of the workers, the required pressure among the components can be reduced by using high-flexibility materials, and meanwhile, microscopic uneven surfaces are covered, so that the components are fully contacted to improve the heat conduction efficiency, the device is particularly suitable for the heat conduction requirement with limited space, the heat dissipation efficiency is further improved, the electrical equipment is prevented from aging, and then the fan 10 is used for dissipating heat inside the shell 2, the fan 10 is electrically connected with an external power supply through a lead, the fan 10 is a device which is driven by electricity to generate air flow, the fan arranged in the fan is electrified and then rotated into natural wind to achieve the effect of cooling, the fan is convenient and practical, the dustproof cover 1302 adopts a metal mesh structure, can prevent dust from entering the inside of the shell 2, reduce the influence of hard granular foreign matters on electrical equipment, ensure the normal use of the device, the positioning rod 1301 is fixed on two sides of the shell 2 by the positioning bolts 1303, thereby supporting the dust cover 1302, being capable of being disassembled and assembled, facilitating the cleaning of the device by the working personnel, fixing grooves 301 are fixed on two sides of the shell 2 through fixing bolts 302, then a foldable handle 303 is used for assisting a worker to install the device on a refrigerating unit, and friction force between the device and the hands is increased through an anti-slip sleeve 304, so that the phenomenon of slipping of the hands is prevented.

The lead is led out through the wiring pipe 202, the extended wiring pipe 202 can prevent rainwater from permeating, the drying inside the shell 2 is guaranteed, then the touch screen is installed through the installation hole 604 in cooperation with a screw, then the control switch is installed through the switch hole 602, in the using process, a worker can observe the condition inside the shell 2 through the observation window 8, then the door lock 7 is opened through a key for maintenance, the operation is convenient, then maintenance tools are stored through the two drawers 402, the worker can conveniently take and maintain the device, the normal use of the device is guaranteed, then the device is installed on a refrigerating unit through the bolt holes 503 in cooperation with the screw, then the device is reinforced through the reinforcing rod 502, the strength of the device is improved, and the use of the worker is facilitated;

wherein, the top of the top plate 1 is equidistantly provided with heat dissipation fins 102, and both sides of the heat dissipation fins 102 are fixedly provided with hooks 101;

it should be noted that the heat dissipation area can be increased by using the heat dissipation fins 102, the heat dissipation effect is good, and the position of the device can be conveniently adjusted by using the hooks 101;

wherein, both sides of the housing 2 are fixedly provided with a guide seat 201, and one side of the guide seat 201 is fixedly provided with a wire connecting tube 202;

it should be noted that, the wire is led out through the wire connecting tube 202, and the extended wire connecting tube 202 can prevent the penetration of rainwater, so as to ensure the dryness of the inside of the housing 2;

the carrying assembly 3 comprises a fixing groove 301, fixing bolts 302 are movably mounted on two sides of the fixing groove 301, a handle 303 is movably mounted inside the fixing groove 301, and an anti-skid sleeve 304 is fixedly arranged on the surface of the handle 303;

it should be noted that the fixing slots 301 are fixed on both sides of the housing 2 by the fixing bolts 302, then the foldable handle 303 is used to assist the worker to mount the device on the refrigeration unit, and the anti-slip sleeve 304 is used to increase the friction force with the human hand to prevent the phenomenon of slipping of the hand;

wherein, the interior of the storage tank 4 is fixedly provided with a partition board 401, and both sides of the partition board 401 are movably provided with drawers 402;

it should be noted that the two drawers 402 are used for storing the maintenance tools, so that the maintenance tool is convenient for workers to take and use, and the normal use of the maintenance tool is ensured;

the supporting assembly 5 comprises a mounting frame 501, bolt holes 503 are equidistantly arranged in the mounting frame 501, and reinforcing rods 502 are fixedly mounted on two sides of the interior of the mounting frame 501;

the device is mounted on the refrigeration unit by using the bolt holes 503 and the screws, and then is reinforced by using the reinforcing rods 502, so that the strength of the device is improved, and the device is convenient for workers to use.

The surface of the door body 6 is equidistantly provided with instrument windows 601, the bottoms of the instrument windows 601 are equidistantly provided with switch holes 602, the bottoms of the switch holes 602 are provided with through holes 603, and two sides of the through holes 603 are equidistantly provided with mounting holes 604;

in the using process, a worker uses the observation window 8 to observe the condition inside the shell 2, and then uses the key to open the door lock 7 to perform maintenance work, so that the operation is convenient.

The mounting assembly 9 comprises a fixing frame 902, first limiting holes 904 are equidistantly formed in the surface of the second limiting holes 905, a connecting rod 901 is movably mounted between the fixing frames 902 through a connecting bolt 903, and the second limiting holes 905 are equidistantly formed in the surface of the connecting rod 901;

it should be noted that, the first limiting hole 904 is used for being matched with the connecting bolt 903 to install the connecting rod 901, and then the second limiting hole 905 is used for being matched with a screw to install the electrical equipment, so that the mounting and dismounting are simple, and the assembly by workers is convenient.

The heat dissipation assembly 11 includes a heat dissipation plate 1101, and heat dissipation pads 1102 are equidistantly arranged on the surface of the heat dissipation plate 1101;

it should be noted that the heat dissipation pad 1102 is made of heat dissipation silica gel, and can utilize high-flexibility materials, so that the pressure required between components can be reduced, and the micro-uneven surface can be covered, so that the components can be fully contacted, the heat conduction efficiency can be improved, the heat dissipation pad is particularly suitable for the heat conduction requirement with limited space, the heat dissipation efficiency can be further improved, the electrical equipment can be prevented from aging, and the heat dissipation plate 1101 is made of a heat dissipation aluminum substrate, so that the copper clad plate is a unique metal heat dissipation base copper clad plate, and has good heat conductivity and electrical insulation performance.

The dustproof assembly 13 comprises a dustproof cover 1302, a positioning rod 1301 is movably mounted on the surface of the dustproof cover 1302, and a positioning bolt 1303 is movably mounted on the surface of the positioning rod 1301;

it should be noted that, dust cover 1302 adopts the metal mesh structure, can prevent that the dust from carrying out the inside of casing 2, reduces the influence of the graininess foreign matter of stereoplasm to electrical equipment, guarantees the normal use of device, utilizes locating pin 1303 to fix locating lever 1301 in the both sides of casing 2 to support dust cover 1302, can carry out the dismouting, make things convenient for the staff to clear up this device.

In the invention, when a user uses the device, referring to the attached drawing 1, the attached drawing 2, the attached drawing 3 and the attached drawing 4 of the specification, when the device works, a lead is led out through the wiring pipe 202, the extended wiring pipe 202 can prevent rainwater from permeating, the inside of the shell 2 is ensured to be dry, then the touch screen is installed through the installation hole 604 and the screw, then the control switch is installed through the switch hole 602, in the using process, a worker observes the inside condition of the shell 2 through the observation window 8, then the door lock 7 is opened through the key for maintenance work, the operation is convenient, then maintenance tools are stored through the two drawers 402, the worker can conveniently take and use the device for maintenance, the normal use of the device is ensured, and then the device is installed on a refrigerating unit through the bolt hole 503 and the screw, then utilize reinforcing rod 502 to consolidate this device, improve this device's intensity, make things convenient for the staff to use.

When a user uses the device, referring to the attached drawing 1, the attached drawing 2, the attached drawing 3, the attached drawing 4, the attached drawing 5, the attached drawing 6 and the attached drawing 7 of the specification, when the device works, the heat dissipation area is increased by the heat dissipation fins 102, the heat dissipation effect is good, the position of the device is convenient for workers to adjust by the hooks 101, then the connecting rod 901 is installed by the first limiting hole 904 matched with the connecting bolt 903, then the electrical equipment is installed by the second limiting hole 905 matched with the screw, the disassembly and the assembly are simple, the workers can assemble the device conveniently, the wires are orderly arranged by the wire inlet frame 12, the workers can overhaul conveniently, then the required pressure among the components can be reduced by using high-flexibility materials, and the microcosmic uneven surfaces can be covered at the same time, thereby making the components fully contact and improving the heat conduction efficiency, particularly being suitable for the heat conduction requirement with limited space, further improving the heat dissipation efficiency, preventing the electrical equipment from aging, then utilizing the fan 10 to dissipate heat inside the shell 2, the fan 10 is electrically connected with an external power supply through a lead, the fan 10 is a device which is driven by electricity to generate air flow, the internally configured fan is electrified and then rotated into natural wind to achieve the effect of cooling, convenient and practical, the dust cover 1302 adopts a metal mesh structure, can prevent dust from entering the interior of the shell 2, reduce the influence of hard granular foreign matters on the electrical equipment, ensure the normal use of the device, utilizing the positioning bolts 1303 to fix the positioning rods 1301 at the two sides of the shell 2, thereby supporting the dust cover 1302, being capable of dismounting, facilitating workers to clean the device, and then fixing the fixing grooves 301 at the two sides of the shell 2 through the fixing bolts 302, then, the foldable handle 303 is used for assisting a worker to install the device on the refrigerating unit, and the friction force between the device and the hand of the worker is increased by using the anti-slip sleeve 304, so that the phenomenon of hand slip is prevented.

The above description is only for the preferred embodiment of the present invention, but the scope of the present invention is not limited thereto, and any person skilled in the art should be considered to be within the technical scope of the present invention, and the technical solutions and the inventive concepts thereof according to the present invention should be equivalent or changed within the scope of the present invention.

Claims

1. The PLC touch screen control cabinet convenient and fast to overhaul for the refrigerating unit is characterized by comprising a shell (2), a supporting assembly (5) and a mounting assembly (9), wherein a top plate (1) is fixedly mounted at the top of the shell (2), the mounting assembly (9) is fixedly mounted in the shell (2), a wire inlet frame (12) is movably mounted on the surface of the mounting assembly (9), heat dissipation assemblies (11) are arranged in the mounting assembly (9) at equal intervals, fans (10) are fixedly mounted on two sides of each heat dissipation assembly (11), dustproof assemblies (13) are movably mounted on two sides of the shell (2), and carrying assemblies (3) are fixedly mounted at the bottoms of the dustproof assemblies (13);

the utility model discloses a door lock, including casing (2), fixed surface hinge movable mounting has a door body (6), the fixed surface of the door body (6) is provided with lock (7), the fixed observation window (8) that is provided with in bottom of lock (7), the fixed storage tank (4) that is provided with in bottom of casing (2), the bottom movable mounting of storage tank (4) has supporting component (5).

2. The PLC touch screen control cabinet for the refrigerating unit convenient to overhaul as claimed in claim 1, wherein the top of the top plate (1) is provided with heat dissipation fins (102) at equal intervals, and hooks (101) are fixedly mounted on both sides of the heat dissipation fins (102).

3. The PLC touch screen control cabinet for the refrigerating unit convenient to overhaul as claimed in claim 1, wherein guide seats (201) are fixedly arranged on both sides of the housing (2), and a wiring pipe (202) is fixedly arranged on one side of each guide seat (201).

4. The PLC touch screen control cabinet for the refrigerating unit, which is convenient to overhaul and comprises according to claim 1, wherein the carrying assembly (3) comprises a fixing groove (301), fixing bolts (302) are movably mounted on both sides of the fixing groove (301), a handle (303) is movably mounted inside the fixing groove (301), and an anti-skid sleeve (304) is fixedly arranged on the surface of the handle (303).

5. The PLC touch screen control cabinet for the refrigerating unit, which is convenient to overhaul, as claimed in claim 1, wherein a partition plate (401) is fixedly installed inside the storage tank (4), and drawers (402) are movably installed on both sides of the partition plate (401).

6. The refrigeration unit PLC touch screen control cabinet convenient to overhaul as claimed in claim 1, wherein the support assembly (5) comprises a mounting frame (501), bolt holes (503) are equidistantly formed in the mounting frame (501), and reinforcing rods (502) are fixedly mounted on two sides of the inside of the mounting frame (501).

7. The PLC touch screen control cabinet for the refrigerating unit convenient to overhaul according to claim 1, wherein instrument windows (601) are equidistantly arranged on the surface of the door body (6), switch holes (602) are equidistantly arranged at the bottoms of the instrument windows (601), through holes (603) are arranged at the bottoms of the switch holes (602), and mounting holes (604) are equidistantly arranged on two sides of each through hole (603).

8. The PLC touch screen control cabinet for the refrigerating unit convenient to overhaul as claimed in claim 1, wherein the mounting assembly (9) comprises a fixing frame (902), first limiting holes (904) are formed in the surface of the second limiting holes (905) at equal intervals, a connecting rod (901) is movably mounted between the fixing frames (902) through a connecting bolt (903), and the second limiting holes (905) are formed in the surface of the connecting rod (901) at equal intervals.

9. The PLC touch screen control cabinet for the refrigerating unit convenient to overhaul as claimed in claim 1, wherein the heat dissipation assembly (11) comprises a heat dissipation plate (1101), and heat dissipation pads (1102) are arranged on the surface of the heat dissipation plate (1101) at equal intervals.

10. The PLC touch screen control cabinet for the refrigerating unit convenient to overhaul as claimed in claim 1, wherein the dust-proof assembly (13) comprises a dust-proof cover (1302), a positioning rod (1301) is movably mounted on the surface of the dust-proof cover (1302), and a positioning bolt (1303) is movably mounted on the surface of the positioning rod (1301).