CN116592157A

CN116592157A - Manual valve state feedback device and manual valve

Info

Publication number: CN116592157A
Application number: CN202310573749.4A
Authority: CN
Inventors: 朱常有; 项城炜; 张继; 周国军
Original assignee: Qili Holding Group Co ltd
Current assignee: Qili Holding Group Co ltd
Priority date: 2023-05-18
Filing date: 2023-05-18
Publication date: 2023-08-15

Abstract

The application relates to a manual valve state feedback device and a manual valve, and relates to the technical field of valves, comprising a bracket, a scaler and an inductor, wherein the bracket is used for being connected with a valve body; the scaler is used for being connected with the valve rod, a first magnetic sheet and a second magnetic sheet are arranged on the outer side of the scaler, and the first magnetic sheet and the second magnetic sheet are arranged in a staggered mode along the axial direction of the scaler; the sensor is used for sensing the approaching of the first magnetic sheet and the second magnetic sheet, the valve is in an open state when the first magnetic sheet is opposite to the sensor, and the valve is in a closed state when the second magnetic sheet is opposite to the sensor. The application utilizes the inductor to induce the first magnetic sheet and the second magnetic sheet to determine the opening and closing states of the valve and feeds back the states to the central control system, thereby realizing the remote monitoring of the states of the manual valve.

Description

Manual valve state feedback device and manual valve

Technical Field

The application relates to the field of valves, in particular to a manual valve state feedback device and a manual valve.

Background

The valve is a pipeline accessory for opening and closing a pipeline, controlling flow direction, adjusting and controlling parameters of a conveying medium. The valves may be classified into shut-off valves, check valves, regulating valves, etc. according to their functions. The shutoff valve includes a manual valve, an electric valve, a pneumatic valve, and the like.

In modern industry, the demand of informatization is higher and higher, and the valve is required to feed back the switch state to the control system, so that the industrial production data and visualization are realized. For newly developed projects, pneumatic valves or electric valves can be adopted for remote monitoring and control. However, for the scene that needs to use the manual valve, remote monitoring cannot be realized, so that the requirement of industrial informatization cannot be met.

Disclosure of Invention

In order to realize remote monitoring of the state of the manual valve, the application provides a manual valve state feedback device and a manual valve.

In a first aspect, the present application provides a manual valve status feedback device, which adopts the following technical scheme:

the manual valve state feedback device comprises a bracket, a scaler and an inductor, wherein the bracket is used for being connected with a valve body, and the scaler and the inductor are both arranged on the bracket;

the scaler is used for being connected with the valve rod, a first magnetic sheet and a second magnetic sheet are arranged on the outer side of the scaler, and the first magnetic sheet and the second magnetic sheet are arranged in a staggered mode along the axial direction of the scaler;

the sensor is used for sensing the approaching of the first magnetic sheet and the second magnetic sheet, the valve is in an open state when the first magnetic sheet is opposite to the sensor, and the valve is in a closed state when the second magnetic sheet is opposite to the sensor.

Through adopting above-mentioned technical scheme, utilize inductor response first magnetic sheet and second magnetic sheet to confirm the open and close state of valve, and feed back to well accuse system, realize manual valve state's remote monitoring.

Optionally, the scaler comprises a shell, a rotating shaft connected with the shell and a connecting shaft used for being connected with the valve rod, and the rotating shaft is in plug-in fit with the connecting shaft.

By adopting the technical scheme, the fault tolerance of the manual valve state feedback device is improved, and the condition of difficult assembly caused by precision errors is reduced.

Optionally, the connecting axle includes the screw thread section that is used for with valve rod threaded connection and supplies rotation axis male joint, the screw thread section is connected with the joint, screw thread section outside threaded connection has the coupling nut that is used for supporting tight valve rod terminal surface.

Through adopting above-mentioned technical scheme, during the installation, screw thread section screw in the valve rod earlier, screw up the nut again for the connecting axle is fixed relative to the valve rod, again install the rotation axis can, convenient assembling.

Optionally, the connector is provided with a straight slot, and the end part of the rotating shaft is connected with a plugboard inserted into the straight slot.

By adopting the technical scheme, the straight groove plays a role in facilitating screwing of the connecting shaft and inserting of the rotating shaft.

Optionally, the rotation axis outside is provided with the ring channel, ring channel department is provided with the jump ring, be provided with the packing ring between jump ring and the support.

By adopting the technical scheme, the installation mode of the rotating shaft and the shell relative to the bracket is rapid and convenient.

Optionally, the casing outside rotates and has cup jointed the swivel becket, first magnetic sheet is connected with the swivel becket, the casing outside is provided with the scale mark that is located between first magnetic sheet and the second magnetic sheet, the scale mark is used for the contained angle of sign first magnetic sheet and second magnetic sheet about the scaler axial lead.

Through adopting above-mentioned technical scheme, make the contained angle that first magnetic sheet and second magnetic sheet are about the scaler axial lead change after the swivel becket rotates, except 90 degrees state that open completely, other aperture states also can feed back to increase manual valve state feedback device's application scope.

Optionally, the casing is provided with the rotation groove that supplies the rotation ring card to go into, the rotation groove inner wall is provided with a plurality of draw-in grooves along circumference interval, one side that the rotation ring is close to the draw-in groove is provided with the spout, be provided with the fixture block that is used for the card to go into the draw-in groove in the spout, be provided with the spring between spout inner wall and the fixture block, the one end that the draw-in groove was kept away from to the fixture block is connected with the pull handle, the spout intercommunication has the through-hole that supplies the pull handle to stretch out and slide.

Through adopting above-mentioned technical scheme, when needs drive the swivel becket and rotate, pulling handle is in order to drive fixture block and draw-in groove separation, loosens the handle after rotating to required position for the fixture block card goes into the draw-in groove, and the swivel becket just is fixed relative to the casing, guarantees manual valve state feedback device normal operating.

Optionally, the support is connected with first cleaning roller and the second cleaning roller of laminating with the scaler, first cleaning roller is located the rotation route of first magnetic sheet, the second cleaning roller is located the rotation route of second magnetic sheet.

Through adopting above-mentioned technical scheme, first magnetic sheet and second magnetic sheet rotate to just in the route of inductor, and first cleaning roller and second cleaning roller clean its surface to guarantee that the inductor inducted the magnetic signal smoothly.

In a second aspect, the present application provides a manual valve, which adopts the following technical scheme:

a manual valve comprises a valve body, a valve seat, a valve core, a valve rod, a handle and a manual valve state feedback device.

Optionally, the valve body includes the main part and is located the lid of the relative both sides of main part, main part and lid outside all are connected with the otic placode, two the lid with the otic placode that the main part corresponds wears to be equipped with fastening bolt jointly, fastening bolt threaded connection has fastening nut and fixation nut, the support is provided with the fixed orifices that supplies fastening bolt to pass, fastening nut and fixation nut laminate respectively in the relative both sides of support.

Through adopting above-mentioned technical scheme, the valve body is three formula, and the dismouting is convenient on the one hand, and convenient maintenance is convenient for fix manual valve state feedback device on the other hand.

In summary, the present application includes at least one of the following beneficial technical effects:

1. the application utilizes the inductor to induce the first magnetic sheet and the second magnetic sheet to determine the opening and closing states of the valve and feeds back the states to the central control system to realize the remote monitoring of the states of the manual valve;

2. the manual valve state feedback device can be modified and installed on the basis of the existing manual valve, the operation of the existing valve is not affected, and the modification and installation are convenient;

3. through the arrangement of the rotating ring, the included angle between the first magnetic sheet and the second magnetic sheet relative to the axis of the scaler can be changed, so that the application range of the manual valve state feedback device is increased;

4. through the setting of first cleaning roller and second cleaning roller to be convenient for clean first magnetic sheet and second magnetic sheet, ensure manual valve state feedback device normal operating.

Drawings

FIG. 1 is a schematic view of the structure of a manual ball valve according to embodiment 1 of the present application;

FIG. 2 is an exploded schematic view of a manual ball valve according to example 1 of the present application;

FIG. 3 is an exploded schematic view of the valve seat and valve element of example 1 of the present application;

FIG. 4 is a schematic structural diagram of a manual valve status feedback device according to embodiment 1 of the present application;

FIG. 5 is an exploded view of the scaler of embodiment 1 of the present application;

FIG. 6 is a schematic structural diagram of a manual valve status feedback device according to embodiment 2 of the present application;

FIG. 7 is a schematic view of a manual valve status feedback device according to embodiment 3 of the present application;

FIG. 8 is an exploded view of the scaler of embodiment 3 of the present application;

fig. 9 is a schematic cross-sectional view of a rotary ring according to embodiment 3 of the present application.

Reference numerals illustrate: 1. a bracket; 11. a fixing hole; 2. a scaler; 21. a first magnetic sheet; 22. a second magnetic sheet; 23. a housing; 231. scale marks; 232. a rotating groove; 233. a clamping groove; 24. a rotation shaft; 241. inserting plate; 242. an annular groove; 25. a connecting shaft; 251. a threaded section; 252. a joint; 2521. a straight slot; 26. clamping springs; 27. a gasket; 28. a rotating ring; 281. a chute; 282. a clamping block; 283. a spring; 284. a pull handle; 285. a through hole; 29. a coupling nut; 3. an inductor; 4. a first cleaning roller; 5. a second cleaning roller; 6. a valve body; 61. a main body; 62. a cover body; 63. ear plates; 64. a fastening bolt; 65. a fastening nut; 66. a fixing nut; 7. a valve seat; 8. a valve core; 9. a valve stem; 10. a handle.

Detailed Description

The application is described in further detail below with reference to fig. 1-9.

The embodiment of the application discloses a manual valve state feedback device and a manual valve.

Example 1:

referring to fig. 1 and 2, a manual valve comprises a valve body 6, a valve seat 7, a valve core 8, a valve rod 9, a handle 10 and a manual valve state feedback device, wherein the valve core 8 and the valve seat 7 are both arranged inside the valve body 6, the valve rod 9 is inserted into the valve core 8, the handle 10 is fixedly connected with the valve rod 9, and the valve core 8 can be driven to rotate by twisting the handle 10, so that a through cavity of the valve body 6 for fluid to pass is opened or closed.

It should be noted that, in the embodiment of the present application, the manual valve is a ball valve, and in other embodiments, the manual valve state feedback device may also be applied to other valves that are manually opened in a rotating manner, such as a butterfly valve.

Referring to fig. 1 and 2, the valve body 6 includes a main body 61 and a cover 62 located on two opposite sides of the main body 61, and the main body 61 and the cover 62 are respectively provided with corresponding through cavities for fluid to pass through. The upper end of the through cavity of the main body 61 is communicated with an installation cavity for installing the valve rod 9, the packing, the pressing sleeve and other parts, and it is to be noted that the structure of the manual ball valve is the prior art, and the packing, the pressing sleeve and other parts are not described in detail.

Referring to fig. 2 and 3, the valve core 8 is provided with a groove into which the valve rod 9 is inserted, and the valve core 8 can be rotated by rotating the valve rod 9. The valve seat 7 and the valve core 8 are both positioned in the through cavity of the main body 61, the valve core 8 is a straight-through sphere, the valve seat 7 is provided with two valve cores 8 which are symmetrically arranged at two sides of the valve core 8, and a ball cavity for accommodating the valve core 8 is formed between the two valve seats 7. The valve seat 7 is made of polytetrafluoroethylene, and the valve seat 7 is attached to the inner wall of the main body 61 and is abutted by the cover 62.

Referring to fig. 1 and 2, the manual valve state feedback device comprises a bracket 1, a scaler 2 and an inductor 3, wherein the bracket 1 is used for being connected with a valve body 6, the scaler 2 and the inductor 3 are both installed on the bracket 1, and the scaler 2 is connected with a valve rod 9. The valve rod 9 drives the scaler 2 to rotate, and the sensor 3 senses the position state of the scaler 2 so as to determine the opening and closing states of the valve.

Referring to fig. 1 and 2, in order to facilitate the installation of the manual valve state feedback device, two symmetrically arranged lugs 63 are fixedly connected to the outer side of the main body 61, and four lugs 63 which are equally spaced about the axis are fixedly connected to the outer side of the cover 62. The two cover bodies 62 and the two corresponding groups of lug plates 63 of the main body 61 are respectively provided with a fastening bolt 64 in a penetrating way, the end parts of the fastening bolts 64 are connected with a fastening nut 65 and a fixing nut 66 in a threaded manner, and the two corresponding groups of lug plates 63 of the two cover bodies 62 are also connected through bolts and nuts.

Wherein, the fastening nut 65 abuts against the corresponding lug plate 63, and the fixing nut 66 is located at one side of the fastening nut 65 away from the head of the fastening bolt 64. The bracket 1 is provided with a fixing hole 11 through which the shank of the fastening bolt 64 passes, and a fastening nut 65 and a fixing nut 66 are respectively attached to opposite sides of the bracket 1. On the basis of the assembled structure of the three-piece ball valve, the length of the fastening bolt 64 is increased, and the fixing nut 66 is arranged to realize the installation of the manual valve state feedback device. In the other embodiments, instead of using a three-piece ball valve, the bracket 1 may be fixed to the valve body 6 by welding or the like.

Referring to fig. 2 and 4, the bracket 1 comprises a first vertical plate, a sloping plate, a second vertical plate and a flat plate which are sequentially connected, the first vertical plate drives the fixing hole 11, the first vertical plate is parallel to the second vertical plate, the flat plate is perpendicular to the second vertical plate, and the scaler 2 and the inductor 3 are all installed at the flat plate. The support 1 of this structure has sufficient support strength and large plate area, and the overall space layout is reasonable.

Referring to fig. 4 and 5, the sealer 2 includes a housing 23, a rotation shaft 24 fixedly connected to the housing 23, and a connection shaft 25 connected to the valve rod 9, wherein the housing 23 has a circular outer cross section and is fixedly connected to a knob at an upper end thereof. The housing 23 is located on the side of the holder 1 facing away from the valve body 6, and the sealer 2 is located on the side of the housing 23. The outer side of the shell 23 is fixedly connected with a first magnetic sheet 21 and a second magnetic sheet 22, the first magnetic sheet 21 and the second magnetic sheet 22 are made of magnetic metal, the shell 23 is made of plastic, and the first magnetic sheet 21 and the second magnetic sheet 22 are arranged in a staggered mode along the axial direction of the scaler 2.

The midpoint of the first magnetic sheet 21 forms a first connecting line with the axial lead of the shell 23, and the midpoint of the second magnetic sheet 22 forms a second connecting line with the axial lead of the shell 23. And in the overlooking view angle, the plane projection included angle of the first connecting line and the second connecting line is 90 degrees. The angle is hereinafter abbreviated as: the first magnetic sheet 21 and the second magnetic sheet 22 are included with respect to the axis of the scaler 2.

Referring to fig. 4 and 5, the inductor 3 is a hall type, and two hall elements are disposed inside one end of the inductor 3, which is close to the scaler 2, and the two hall elements are distributed up and down to correspond to the first magnetic sheet 21 and the second magnetic sheet 22, respectively, so that the inductor 3 can be used for sensing the proximity of the first magnetic sheet 21 and the second magnetic sheet 22. When the valve is in an open state, the first magnetic sheet 21 is opposite to the sensor 3, wherein a Hall element senses the approach of the first magnetic sheet 21 and feeds a signal back to the central control system so as to remotely determine the open state of the valve; when the valve is in a closed state, the second magnetic sheet 22 is opposite to the sensor 3, and the other Hall element senses the approach of the second magnetic sheet 22 and feeds back a signal to the central control system so as to remotely determine the closed state of the valve.

Referring to fig. 2 and 5, the rotary shaft 24 is in plug-in fit with the connecting shaft 25, the connecting shaft 25 comprises a threaded section 251 for being in threaded connection with the valve rod 9 and a joint 252 for inserting the rotary shaft 24, an inner screw hole in threaded fit with the threaded end is formed in the upper end of the valve rod 9, and a connecting nut 29 for abutting against the end face of the valve rod 9 is in threaded connection with the outer side of the threaded section 251. The joint 252 is fixedly connected to one end of the threaded section 251 near the rotating shaft 24, a straight slot 2521 is arranged at one end of the joint 252 near the rotating shaft 24, and a plugboard 241 inserted into the straight slot 2521 is fixedly connected to the end of the rotating shaft 24. An annular groove 242 is arranged on the outer side of the rotating shaft 24, a clamping spring 26 is arranged at the annular groove 242, and a gasket 27 is arranged between the clamping spring 26 and the bracket 1.

During assembly, the threaded section 251 is screwed into the valve rod 9, the nut is screwed down, the connecting shaft 25 is fixed relative to the valve rod 9, the shell 23 is placed on the support 1, the rotating shaft 24 penetrates through the support 1, the gasket 27 is sleeved outside the rotating shaft 24, the inserting plate 241 is inserted into the linear groove 2521, and finally the clamp spring 26 is clamped at the annular groove 242, so that assembly is completed.

The implementation principle is as follows:

the handle 10 drives the valve rod 9 to rotate so as to realize the switching of the valve opening and closing states, the valve rod 9 drives the scaler 2 to rotate in the switching process, the first magnetic sheet 21 and the second magnetic sheet 22 move relative to the inductor 3, the inductor 3 determines whether the valve is in an opening state or a closing state through the approach of the first magnetic sheet 21 or the second magnetic sheet 22, and the valve state is fed back to the central control system so as to realize remote monitoring.

Example 2:

the difference from embodiment 1 is that the bracket 1 is rotatably connected with a first cleaning roller 4 and a second cleaning roller 5.

Referring to fig. 6, the first cleaning roller 4 and the second cleaning roller 5 are attached to the outside of the scaler 2. The first cleaning roller 4 is located on the rotational path of the first magnetic sheet 21, and the second cleaning roller 5 is located on the rotational path of the second magnetic sheet 22. The first cleaning roller 4 and the second cleaning roller 5 both comprise a rotating shaft and a sponge sleeve fixedly sleeved on the outer side of the rotating shaft. The first magnetic sheet 21 and the second magnetic sheet 22 are rotated into a path facing the inductor 3, and the first cleaning roller 4 and the second cleaning roller 5 clean the surfaces thereof to ensure that the inductor 3 senses magnetic signals smoothly.

Example 3:

the difference from embodiment 1 is that the first magnetic sheet 21 is movable to increase the applicable range of the feedback device.

Referring to fig. 7 and 8, the outer side of the housing 23 is rotatably sleeved with the rotary ring 28, the first magnetic sheet 21 is fixedly connected to the outer side of the rotary ring 28, and the housing 23 is provided with a rotary groove 232 into which the rotary ring 28 is clamped. The outer side of the shell 23 is provided with graduation marks 231 between the first magnetic sheet 21 and the second magnetic sheet 22, and the graduation marks 231 are used for marking the included angles of the first magnetic sheet 21 and the second magnetic sheet 22 relative to the axial lead of the scaler 2. By rotating the rotating ring 28, the position of the first magnetic sheet 21 relative to the second magnetic sheet 22 can be moved, so that the included angle between the first magnetic sheet 21 and the second magnetic sheet 22 relative to the axis of the scaler 2 is changed.

For example, if the included angle is changed to 45 degrees, the feedback device can monitor the valve opening state and the state that the opening is 45 degrees on line, and the feedback device is suitable for the situation that the opening is often required to be adjusted in order to meet the flow demand.

Referring to fig. 8 and 9, in order to facilitate fixing of the adjusted rotating ring 28, a plurality of locking grooves 233 are provided at equal intervals in the circumferential direction at a quarter arc of the inner wall of the rotating groove 232. The side of the rotating ring 28, which is close to the clamping groove 233, is provided with a sliding groove 281, a clamping block 282 for clamping into the clamping groove 233 is arranged in the sliding groove 281, and the clamping block 282 can slide in the sliding groove 281 close to or far from the clamping groove 233. A spring 283 is fixedly connected between the inner bottom wall of the chute 281 far away from the clamping groove 233 and the clamping block 282, and the spring 283 applies thrust to the clamping block 282, so that the clamping block 282 is clamped into the clamping grooves 233 at different positions, and the fixation of the rotating ring 28 is completed. The end of the clamping block 282 away from the clamping groove 233 is fixedly connected with a pull handle 284, and the sliding groove 281 is communicated with a through hole 285 for the pull handle 284 to extend and slide. By pulling the pull handle 284, the latch 282 and the latch slot 233 can be driven to separate, so that the rotating ring 28 can rotate.

The implementation principle is as follows:

when a certain specific opening in 0-90 degrees is required to be monitored online, the pull handle 284 is pulled to separate the clamping block 282 from the clamping groove 233, the rotating ring 28 is rotated until the first magnetic sheet 21 reaches the position corresponding to the scale mark 231, and then the pull handle 284 is loosened to clamp the clamping block 282 into the clamping groove 233.

The above embodiments are not intended to limit the scope of the present application, so: all equivalent changes in structure, shape and principle of the application should be covered in the scope of protection of the application.

Claims

1. A manual valve state feedback device, characterized in that: the automatic calibration device comprises a bracket (1), a calibrator (2) and an inductor (3), wherein the bracket (1) is used for being connected with a valve body (6), and the calibrator (2) and the inductor (3) are both arranged on the bracket (1);

the scaler (2) is used for being connected with the valve rod (9), a first magnetic sheet (21) and a second magnetic sheet (22) are arranged on the outer side of the scaler (2), and the first magnetic sheet (21) and the second magnetic sheet (22) are arranged in a staggered mode along the axial direction of the scaler (2);

the sensor (3) is used for sensing the approaching of the first magnetic sheet (21) and the second magnetic sheet (22), the valve is in an open state when the first magnetic sheet (21) is opposite to the sensor (3), and the valve is in a closed state when the second magnetic sheet (22) is opposite to the sensor (3).

2. A manual valve condition feedback device according to claim 1, wherein: the scaler (2) comprises a shell (23), a rotating shaft (24) connected with the shell (23) and a connecting shaft (25) used for being connected with the valve rod (9), wherein the rotating shaft (24) is in plug-in fit with the connecting shaft (25).

3. A manual valve condition feedback device according to claim 2, wherein: the connecting shaft (25) comprises a threaded section (251) which is in threaded connection with the valve rod (9) and a joint (252) into which the rotating shaft (24) is inserted, the threaded section (251) is connected with the joint (252), and a connecting nut (29) which is used for abutting against the end face of the valve rod (9) is in threaded connection with the outer side of the threaded section (251).

4. A manual valve condition feedback device according to claim 3, wherein: the connector (252) is provided with a straight slot (2521), and the end part of the rotating shaft (24) is connected with a plugboard (241) inserted into the straight slot (2521).

5. A manual valve condition feedback device according to claim 2, wherein: an annular groove (242) is formed in the outer side of the rotating shaft (24), a clamp spring (26) is arranged at the annular groove (242), and a gasket (27) is arranged between the clamp spring (26) and the support (1).

6. A manual valve condition feedback device according to claim 2, wherein: the shell (23) outside rotates and has cup jointed swivel ring (28), first magnetic sheet (21) are connected with swivel ring (28), the shell (23) outside is provided with scale mark (231) between first magnetic sheet (21) and second magnetic sheet (22), scale mark (231) are used for the contained angle of sign first magnetic sheet (21) and second magnetic sheet (22) about scaler (2) axial lead.

7. A manual valve condition feedback device according to claim 6, wherein: the casing (23) is provided with the rotary groove (232) that supplies rotary ring (28) card to go into, rotary groove (232) inner wall is provided with a plurality of draw-in grooves (233) along circumference interval, one side that rotary ring (28) is close to draw-in groove (233) is provided with spout (281), be provided with fixture block (282) that are used for the card to go into draw-in groove (233) in spout (281), be provided with spring (283) between spout (281) inner wall and fixture block (282), the one end that draw-in groove (233) was kept away from to fixture block (282) is connected with handle (284), spout (281) intercommunication has through-hole (285) that supply handle (284) to stretch out and slide.

8. A manual valve condition feedback device according to claim 1, wherein: the support (1) is connected with a first cleaning roller (4) and a second cleaning roller (5) which are attached to the scaler (2), the first cleaning roller (4) is located on the rotating path of the first magnetic sheet (21), and the second cleaning roller (5) is located on the rotating path of the second magnetic sheet (22).

9. A manual valve, characterized in that: comprising a valve body (6), a valve seat (7), a valve core (8), a valve stem (9), a handle (10) and a manual valve state feedback device according to any of claims 1 to 8.

10. A manual valve according to claim 9, wherein: the valve body (6) comprises a main body (61) and cover bodies (62) located on two opposite sides of the main body (61), ear plates (63) are connected to the outer sides of the main body (61) and the cover bodies (62), fastening bolts (64) are jointly arranged on the corresponding ear plates (63) of the cover bodies (62) and the main body (61) in a penetrating mode, fastening nuts (65) and fixing nuts (66) are connected with the fastening bolts (64) in a threaded mode, fixing holes (11) for the fastening bolts (64) to penetrate are formed in the support (1), and the fastening nuts (65) and the fixing nuts (66) are respectively attached to two opposite sides of the support (1).