CN111640547A - Cross-over-gear tension-resistant double-hanging-point insulator string connecting structure and assembling method thereof - Google Patents

Abstract

The invention relates to the installation of double-series insulator strings, in particular to a connection structure of double-hanging-point insulator strings spanning a span and an assembling method thereof. The insulator string connection structure with double hanging points spanning gears, including two insulator strings, one end of the insulator string is provided with a connecting arm for connecting the hanging holes on the cross arm, the other end of the insulator string is provided with a connecting bar, and the two insulator strings are provided with a connecting arm. The connecting arms on each insulator string are respectively hinged on the two hanging holes on the cross arm, the connecting bars on the two insulator strings are hinged on the same connecting plate, the connecting plate is hinged with the cable, and the two connecting bars are on the connecting plate The center of the hinge point and the center of the connecting plate and the hinge point of the cable are on the same line and parallel to the line connecting the centers of the two hanging holes on the crossarm. The invention has the beneficial effects of improving the uniformity of the force of the two insulator strings, preventing the disconnection of the insulator strings that are subjected to excessive force, and the like.

Description

A kind of cross-gear tension-resistant double-hanging point insulator string connection structure and assembling method thereof

technical field

The invention relates to the installation of double-series insulator strings, in particular to a connecting structure of double-hanging-point insulator strings spanning the tension resistance and an assembling method thereof.

Background technique

At present, the tension string adopts double string for important spans, such as power lines of 35kV and above, provincial highways, national highways, highways, major navigable rivers, houses and important communication lines. The existing double series usually adopts vertical double hanging points, that is, two hanging holes are vertically arranged on the cross arm, the connection line between the centers of the two hanging holes is usually on a vertical line, and each hanging hole is connected with a A string of insulators. The end points of the end of the two insulator strings away from the hanging hole and the end point of the cable connection end are usually arranged in a triangle or overlapped at the same point, resulting in different lengths of the two insulator strings and uneven stress. Power transmission stability poses a hidden danger.

SUMMARY OF THE INVENTION

The present invention is mainly aimed at the above-mentioned problems, and provides a cross-gear tensile double-hanging point insulator string connection structure and an assembling method thereof. The first purpose of the present invention is to effectively improve the force uniformity of the two insulator strings and to avoid disconnection of the insulator string with excessive force; the second purpose of the present invention is to enable the insulator string at the end of the insulator string away from the hanging hole Achieve lateral buffering and effectively reduce the impact of cross wind on insulator strings.

The first object of the present invention is mainly achieved through the following scheme: a cross-gear tension-resistant double hanging point insulator string connection structure, including two insulator strings, one end of the insulator string is provided with a connection structure for connecting the cross arm The connecting arm of the hanging hole, the other end of the insulator string is provided with a connecting bar, the connecting arms on the two insulator strings are respectively hinged on the two hanging holes on the cross arm, and the connecting bars on the two insulator strings are hinged at the same A connecting plate, the connecting plate is hinged with the cable, the center of the hinge point of the two connecting strips on the connecting plate and the center of the hinge point of the connecting plate and the cable are located on the same line and are in line with the two hanging holes on the crossarm. The lines connecting the centers of the circles are parallel. The connecting arm at one end of the insulator string is hinged to the hanging hole on the cross arm, and then the connecting bars at the other ends of the two insulator strings are connected to the same connecting plate at the same time, and the connection is ensured that the two connecting bars are on the connecting plate. The center of the hinge point and the center of the connection plate and the hinge point of the cable are located on the same line and parallel to the line connecting the centers of the two hanging holes on the crossarm, that is, the connection point between the connecting bar of the two insulator strings and the connecting plate. The connection point of the connecting plate and the cable is located on the same straight line, so that the end points of the connecting arms of the two insulator strings and the end points of the connecting bars of the two insulator strings are a total of four end points to form a parallelogram. Ensure that the two insulator strings are always in a parallel state, and the force at each point is uniform.

Preferably, the connecting plate is shaped like a rhombus, the cable is hinged at the center of the connecting plate, and the connecting plate is provided with several connecting holes for connecting the connecting bars. The connection plate is rhombus-like, making it easier for the connection point between the connection strip and the connection plate to be parallel to the connection line of the two hanging points, and the setting using multiple connection holes can be selected according to the distance between the connection lines of the two hanging points Two connecting holes at the same distance.

The second object of the present invention is mainly achieved through the following scheme: the connecting strip includes a left splint and a right splint respectively located on both sides of the connecting plate, and the connection between the left splint and the right splint and the connecting plate is provided with an axial The moving device, the axial moving device includes left pressing piece and right pressing piece, pins and fastening nuts respectively located on both sides of the connecting plate, the left pressing piece is located between the left clamping plate and the connecting plate, and the right pressing piece is located between the right clamping plate and the connecting plate. Between the plates, the pin bolts pass through the left plywood, the left pressing piece, the connecting hole, the right pressing piece and the right plywood in sequence, a first compression spring is arranged between the pin bolt head and the left plywood, and a first compression spring is arranged between the left plywood and the left pressing piece. The second compression spring, the third compression spring is arranged between the right compression plate and the right clamping plate, the fourth compression spring is arranged between the right clamping plate and the tightening nut, the first compression spring, the second compression spring, the third compression spring and the The fourth compression springs are all sleeved on the pins; a pressure regulating gasket is arranged at the connecting hole, an annular groove is arranged in the middle of the outer wall of the pressure regulating gasket, the edge of the connecting hole is located in the annular groove, and the axis of the pressure regulating gasket is located in the annular groove. There is a mounting hole for the pin bolt to pass through. The cross-sectional diameter of the mounting hole gradually increases from the middle to the two ends. A pressure regulating gas ring is arranged between the edge of the connecting hole and the groove bottom of the annular groove, and the pressure regulating gas ring is annular. And the interior is hollow, the outer wall of the pressure regulating gas ring is provided with a gas nozzle with a one-way valve, and the pressure regulating gas ring is filled with air. The connecting strip adopts the clamping method of the left splint and the right splint, and a left pressing piece and a right pressing piece are respectively installed between the left splint and the right splint. Compression spring, a second compression spring is arranged between the left clamping plate and the left clamping plate, a third compression spring is arranged between the right clamping plate and the right clamping plate, and a fourth compression spring is arranged between the right clamping plate and the tightening nut. The axial rotation of the connecting piece and the connecting hole can be realized by using the pin, and the pin head, the left clamping plate, the left pressing piece, the right pressing There is a certain interval between the plate, the right clamping plate and the fastening nut. When the insulator string encounters a cross wind, the left clamping plate, the left clamping plate, the right clamping plate and the right clamping plate will be axially displaced along the axis direction of the pin. , this axial displacement can help the insulator string comply with the wind force of the cross wind, and the axial displacement will cause the first compression spring or the second compression spring or the third compression spring or the fourth compression spring between each other to be squeezed. The energy storage during the process can not only buffer the connection of the insulator string subjected to the cross wind, but also reduce the rigid shear force of each component. Since the wind force of the cross wind fluctuates instantaneously, the first compression spring or the second compression spring or the third compression spring or the fourth compression spring is used to reduce the fluctuation amplitude between the various components. For example, when the connecting plate moves toward the right clamping plate, the first compression spring and the second compression spring can ensure that the relative positions of the bolt head and the left clamping plate on the bolt remain unchanged, that is, the fluctuation amplitude between the components is reduced. A pressure regulating gasket is arranged at the connecting hole, which is used to cooperate with the lateral movement of each component on the pin. When the insulator string is laterally moved by the cross wind, the axis of the pin is deflected, forming a partial squeeze on the regulating gasket. , the middle of the outer wall of the pressure regulating gasket is provided with an annular groove, the edge of the connecting hole is located in the annular groove, the axis of the pressure regulating gasket is provided with a mounting hole for the pin bolt to pass through, and the cross-sectional diameter of the mounting hole gradually increases from the middle to the two ends. Increase, that is, the adjusting gasket can be made of a metal sleeve, and the two ends of the sleeve are reamed by the reaming process to form a curved mounting hole and an annular groove can be formed, and the enlarged part after reaming can be used to press the connection. plate to realize the assembly of the adjusting gasket and the connecting hole. Before reaming, the pressure regulating gas ring can be pre-installed between the edge of the connecting hole and the groove bottom of the annular groove. When the mounting hole of the pressure regulating gasket is subjected to local pressure, the regulating gasket forms a local pressure on the edge of the connecting hole, and the air in the pressure regulating gas ring can increase the overall pressure of the pressure regulating gas ring. When squeezed by external force, the air in the pressure regulating air ring flows, and the air at the pressure position is squeezed to a position where no force is exerted, and expands and stores energy under pressure to avoid deformation or even tearing of the connecting hole. In the field of high-voltage electricity, especially for high-altitude cable connections, the cross wind of the insulator string is ignored. In practical applications, the cross wind of the insulator string will cause the rigid connection pins and connection holes to deform and tear. The main reason for cracking is to use the movable left clamp plate, left clamp plate, right clamp plate and right clamp plate to cooperate with the flexible connection of the first compression spring, the second compression spring, the third compression spring and the fourth compression spring, which can reduce the number of insulator strings. Affected by the cross wind, the deflection of the pin axis caused by the cross wind is used, and the local pressure adjustment of the pressure regulating gasket and the pressure regulating air ring is matched on the basis of the flexible connection, which can avoid the deformation and tearing of the connection position, and prolong the high altitude. The maintenance cycle reduces the cost of high-altitude maintenance, and the most important thing is to increase the transmission stability of the transmission line.

Preferably, the pressure regulating gas ring is made of rubber material, and the one-way valve includes two mutually covering cover sheets disposed at positions corresponding to the inner surface of the pressure regulating gas ring and the gas nozzle. The pressure regulating balloon is made of rubber material, which can be formed by injection molding, similar to the processing technology of automobile tires. When the needle is inserted into the gas nozzle for inflation, the gas needle can slightly push up the two cover sheets to allow gas to enter. When the gas needle is pulled out, the two cover sheets are covered on the gas nozzle by the action of internal pressure.

Preferably, a plurality of positioning holes are arranged on the connecting strip at intervals. There are also a plurality of positioning holes on the connecting bar, and the position of the suitable positioning holes is selected according to the required length.

A method for assembling the above-mentioned double-hanging-point insulator string connection structure across the gears, characterized in that the connection steps are as follows: 1) Measure the distance between the centers of the two hanging holes on the cross arm, and select the distance between the connecting plates correspondingly The same installation position; 2) The connecting arm at one end of the insulator string is hinged on the hanging hole, and the connecting bar at the other end of the insulator string is hinged on the corresponding connecting plate.

Preferably, in step 2), an inner hollow adjusting air ring is processed by an injection molding process, air is filled into the adjusting air ring, a sleeve with an outer diameter smaller than the connecting hole is selected, the adjusting air ring is sleeved on the sleeve and the adjusting air ring is The ring is clamped between the edge of the connecting hole and the sleeve, and the two ends of the sleeve are reamed by the reaming process to form a pressure regulating washer. Assembly; set the first compression spring on the pin, pass the pin through the left splint, then set the second compression spring on the pin, pass the pin through the left pressure piece, and then pass the pin through the pressure regulating washer Then set the third compression spring on the pin, insert the pin through the right splint, then set the fourth compression spring on the pin, and tighten the fastening bolt on the pin, Complete the assembly operations described in step 2).

Therefore, the connecting structure of the double-hanging point insulator string across the gear of the present invention and the assembling method thereof have the following advantages: On a straight line, the end points of the connecting arms of the two insulator strings and the end points of the connecting bars of the two insulator strings, a total of four end points, form a parallelogram. Ensure that the two insulator strings are always in a parallel state, and the force at each point is uniform.

Description of drawings

Accompanying drawing 1 is a kind of structural representation of the present invention in embodiment 1;

Accompanying drawing 2 is a partial enlarged cross-sectional view of the connection between the connecting strip and the connecting plate in Embodiment 2;

Accompanying drawing 3 is the partial enlarged sectional view of connecting hole in embodiment 2;

Figure 4 is a partial enlarged cross-sectional view of the pressure regulating gas ring near the gas nozzle.

Description: 1-cross arm, 2-hanging hole, 3-connecting arm, 4-insulator string, 5-connecting bar, 6-connecting plate, 7-cable, 8-connecting hole, 9-positioning hole, 10- Pin, 11-pin head, 12-left plate, 13-left plate, 14-right plate, 15-right plate, 16-fastening nut, 17-first compression spring, 18-second compression spring , 19-third compression spring, 20-fourth compression spring, 21-pressure regulating gasket, 22-pressure regulating gas ring, 23-installation hole, 24-air nozzle, 25-cover sheet.

Detailed ways

The technical solutions of the present invention will be further described in detail below through embodiments and in conjunction with the accompanying drawings.

Example 1:

As shown in FIG. 1 , a structure for connecting insulator strings with double hanging points spanning gears includes two insulator strings. One end of the insulator string 4 is provided with a connecting arm 3 for connecting the hanging holes on the cross arm 1 . The other end is provided with a connecting bar, the connecting arms on the two insulator strings are respectively hinged on the two hanging holes 2 on the cross arm, and the connecting bars 5 on the two insulator strings are hinged on the same connecting plate 6, and the connecting plate Hinged with the cable, the center of the hinge point of the two connecting strips on the connecting plate and the center of the hinge point of the connecting plate and the cable 7 are on the same line and parallel to the line connecting the centers of the two hanging holes on the cross arm. The connecting plate is rhombus-like, the cable is hinged at the center of the connecting plate, and the connecting plate is provided with several connecting holes 8 for connecting the connecting bars. Several positioning holes 9 are arranged at intervals on the connecting bar.

The method for assembling a double-hanging-point insulator string connection structure with cross-gear tension resistance is characterized in that the connection steps are as follows: 1) Measure the distance between the centers of the two hanging holes on the cross arm, and select the installation position with the same spacing on the connecting plate correspondingly ;2) The connecting arm at one end of the insulator string is hinged on the hanging hole, and the connecting bar at the other end of the insulator string is hinged on the corresponding connecting plate.

The connecting arm at one end of the insulator string is hinged to the hanging hole on the cross arm, and then the connecting bars at the other ends of the two insulator strings are connected to the same connecting plate at the same time, and the connection is ensured that the two connecting bars are on the connecting plate. The center of the hinge point and the center of the connection plate and the hinge point of the cable are located on the same line and parallel to the line connecting the centers of the two hanging holes on the crossarm, that is, the connection point between the connecting bar of the two insulator strings and the connecting plate. The connection point of the connecting plate and the cable is located on the same straight line, so that the end points of the connecting arms of the two insulator strings and the end points of the connecting bars of the two insulator strings are a total of four end points to form a parallelogram. Ensure that the two insulator strings are always in a parallel state, and the force at each point is uniform. The connection plate is rhombus-like, making it easier for the connection point between the connection strip and the connection plate to be parallel to the connection line of the two hanging points, and the setting using multiple connection holes can be selected according to the distance between the connection lines of the two hanging points Two connecting holes at the same distance.

Embodiment 2: The structure of this embodiment is basically the same as that of Embodiment 1. The difference is that, as shown in Figures 2, 3, and 4, the connecting bar includes a left splint and a right splint that are respectively located on both sides of the connecting plate, and the left splint and An axial moving device is provided at the connection between the right splint and the connecting plate. The axial moving device includes a left pressing piece and a right pressing piece, a pin bolt 10 and a tightening nut 16 respectively located on both sides of the connecting plate, and the left pressing piece is located on the left splint. and the connecting plate, the right pressing piece is located between the right plywood and the connecting plate, the pin bolt passes through the left plywood 12, the left pressing piece 13, the connecting hole, the right pressing piece 14 and the right plywood 15 in turn, the pin head 11 and the left plywood A first compression spring is arranged between, a second compression spring is arranged between the left clamping plate and the left clamping plate, a third compression spring is arranged between the right clamping plate and the right clamping plate, and a third compression spring is arranged between the right clamping plate and the tightening nut. Four compression springs, the first compression spring 17, the second compression spring 18, the third compression spring 19 and the fourth compression spring 20 are all sleeved on the pin; the connecting hole is provided with a pressure regulating washer 21, and the pressure regulating washer The middle of the outer wall is provided with an annular groove, the edge of the connecting hole is located in the annular groove, and the axis of the pressure regulating gasket is provided with a mounting hole 23 for the pin bolt to pass through. A pressure regulating gas ring 22 is arranged between the edge of the hole and the groove bottom of the annular groove. The pressure regulating gas ring is annular and hollow inside. The inside of the balloon is filled with air. The pressure regulating gas ring is made of rubber material, and the one-way valve includes two mutually covering cover sheets 25 arranged at positions corresponding to the inner surface of the pressure regulating gas ring and the gas nozzle.

Process the inner hollow adjusting air ring by injection molding process, fill the air into the adjusting air ring, select a sleeve whose outer diameter is smaller than the connecting hole, set the adjusting air ring on the sleeve and make the adjusting air ring stuck on the edge of the connecting hole and the connecting hole. Between the sleeves, the two ends of the sleeve are reamed by the reaming process to form a pressure regulating washer, and the part after the reaming is pressed on the connecting plate to realize the assembly of the pressure regulating washer and the connecting hole; Set the first compression spring, insert the pin through the left splint, set the second compression spring on the pin, insert the pin through the left pressure piece, and then insert the pin through the mounting hole on the pressure regulating washer and the right pressure piece , then set the third compression spring on the pin, insert the pin through the right splint, then set the fourth compression spring on the pin, tighten the fastening bolt on the pin, and complete the step 2) assembly operation.

The connecting strip adopts the clamping method of the left splint and the right splint, and a left pressing piece and a right pressing piece are respectively installed between the left splint and the right splint. Compression spring, a second compression spring is arranged between the left clamping plate and the left clamping plate, a third compression spring is arranged between the right clamping plate and the right clamping plate, and a fourth compression spring is arranged between the right clamping plate and the tightening nut. The axial rotation of the connecting piece and the connecting hole can be realized by using the pin, and the pin head, the left clamping plate, the left pressing piece, the right pressing There is a certain interval between the plate, the right clamping plate and the fastening nut. When the insulator string encounters a cross wind, the left clamping plate, the left clamping plate, the right clamping plate and the right clamping plate will be axially displaced along the axis direction of the pin. , this axial displacement can help the insulator string comply with the wind force of the cross wind, and the axial displacement will cause the first compression spring or the second compression spring or the third compression spring or the fourth compression spring between each other to be squeezed. The energy storage during the process can not only buffer the connection of the insulator string subjected to the cross wind, but also reduce the rigid shear force of each component. Since the wind force of the cross wind fluctuates instantaneously, the first compression spring or the second compression spring or the third compression spring or the fourth compression spring is used to reduce the fluctuation amplitude between the various components. For example, when the connecting plate moves toward the right clamping plate, the first compression spring and the second compression spring can ensure that the relative positions of the bolt head and the left clamping plate on the bolt remain unchanged, that is, the fluctuation amplitude between the components is reduced. A pressure regulating gasket is arranged at the connecting hole, which is used to cooperate with the lateral movement of each component on the pin. When the insulator string is laterally moved by the cross wind, the axis of the pin is deflected, forming a partial squeeze on the regulating gasket. , the middle of the outer wall of the pressure regulating gasket is provided with an annular groove, the edge of the connecting hole is located in the annular groove, the axis of the pressure regulating gasket is provided with a mounting hole for the pin bolt to pass through, and the cross-sectional diameter of the mounting hole gradually increases from the middle to the two ends. Increase, that is, the adjusting gasket can be made of a metal sleeve, and the two ends of the sleeve are reamed by the reaming process to form a curved mounting hole and an annular groove can be formed, and the enlarged part after reaming can be used to press the connection. plate to realize the assembly of the adjusting gasket and the connecting hole. Before reaming, the pressure regulating gas ring can be pre-installed between the edge of the connecting hole and the groove bottom of the annular groove. When the mounting hole of the pressure regulating gasket is subjected to local pressure, the regulating gasket forms a local pressure on the edge of the connecting hole, and the air in the pressure regulating gas ring can increase the overall pressure of the pressure regulating gas ring. When squeezed by external force, the air in the pressure regulating air ring flows, and the air at the pressure position is squeezed to a position where no force is exerted, and expands and stores energy under pressure to avoid deformation or even tearing of the connecting hole. In the field of high-voltage electricity, especially for high-altitude cable connections, the crosswind of the insulator string is ignored. In practical applications, the crosswind of the insulator string will cause the rigid connection pins and connection holes to deform and tear. The main reason for cracking is to use the movable left clamp plate, left clamp plate, right clamp plate and right clamp plate to cooperate with the flexible connection of the first compression spring, the second compression spring, the third compression spring and the fourth compression spring, which can reduce the number of insulator strings. Affected by the cross wind, the deflection of the pin axis caused by the cross wind is used, and the local pressure adjustment of the pressure regulating gasket and the pressure regulating air ring is matched on the basis of the flexible connection, which can avoid the deformation and tearing of the connection position and prolong the high altitude. The maintenance cycle reduces the cost of high-altitude maintenance, and the most important thing is to increase the transmission stability of the transmission line. The pressure regulating balloon is made of rubber material, which can be formed by injection molding, similar to the processing technology of automobile tires. When the needle is inserted into the gas nozzle for inflation, the gas needle can slightly push up the two cover sheets to allow gas to enter. When the gas needle is pulled out, the two cover sheets are covered on the gas nozzle by the action of internal pressure.

It should be understood that this embodiment is only used to illustrate the present invention and not to limit the scope of the present invention. In addition, it should be understood that after reading the content taught by the present invention, those skilled in the art can make various changes or modifications to the present invention, and these equivalent forms also fall within the scope defined by the appended claims of the present application.

Claims (7)

1. The utility model provides a stride across two hanging point insulator string connection structure of shelves strain insulator, includes two insulator string, its characterized in that, insulator string's one end be provided with the linking arm that is used for connecting the hanging hole on the cross arm, insulator string's the other end is provided with the connecting strip, the linking arm on two insulator string corresponds respectively articulates on two hanging holes on the cross arm, the connecting strip on two insulator string articulates on same connecting plate, the connecting plate is articulated with the cable, the centre of a circle of the pin joint of two connecting strips on the connecting plate and the centre of a circle of the pin joint of connecting plate and cable are located same straight line and are parallel with the centre of a circle line of two hanging holes on the cross arm.

2. The connection structure of a spanning dual strain insulator string according to claim 1, wherein the connection plate is diamond-like, the cable is hinged at the center of the connection plate, and the connection plate is provided with a plurality of connection holes for connecting the connection bars.

3. The connection structure of claim 2, wherein the connection bar comprises a left clamp plate and a right clamp plate respectively located at two sides of the connection plate, axial moving devices are arranged at the joints of the left clamp plate and the right clamp plate with the connection plate, the axial moving devices comprise a left pressing sheet and a right pressing sheet respectively located at two sides of the connection plate, a pin bolt and a fastening nut, the left pressing sheet is located between the left clamp plate and the connection plate, the right pressing sheet is located between the right clamp plate and the connection plate, the pin bolt sequentially penetrates through the left clamp plate, the left pressing sheet, the connection hole, the right pressing sheet and the right clamp plate, a first pressure spring is arranged between the pin bolt head and the left clamp plate, a second pressure spring is arranged between the left clamp plate and the left pressing sheet, a third pressure spring is arranged between the right pressing sheet and the right clamp plate, a fourth pressure spring is arranged between the right clamp plate and the fastening nut, the third pressure spring and the fourth pressure spring are sleeved on the pin bolt; the connecting hole department is provided with the pressure regulating gasket, the middle part of pressure regulating gasket outer wall is provided with the ring channel, the edge of connecting hole is located the ring channel, the axis department of pressure regulating gasket is provided with the mounting hole that is used for supplying the cotter to run through, the section diameter of mounting hole is crescent to both ends by the centre, be provided with the pressure regulating air ring between the edge of connecting hole and the tank bottom of ring channel, the pressure regulating air ring is cyclic annular and inside cavity, be provided with the air cock that has the check valve on the pressure regulating air ring outer wall, the inside packing of pressure regulating air ring has.

4. The connection structure of a spanning strain double hanging point insulator string according to claim 3, wherein the pressure regulating air ring is made of rubber material, and the check valve comprises two mutually covering cover plates arranged at the position corresponding to the air tap on the inner surface of the pressure regulating air ring.

5. The connection structure of a spanning strain double hanging point insulator string according to claim 1, 2, 3 or 4, wherein the connection bar is provided with a plurality of positioning holes at intervals.

6. An assembling method of the connection structure of the span-span tension-resistant double hanging point insulator string according to any one of claims 1 to 6, characterized in that the connection steps are as follows: 1) measuring the distance between the circle centers of the two hanging holes on the cross arm, and correspondingly selecting the mounting positions with the same distance on the connecting plate; 2) and the connecting arm at one end of the insulator string is hinged on the hanging hole, and the connecting strip at the other end of the insulator string is hinged on the corresponding connecting plate.

7. The assembling method according to claim 6, wherein in the step 2), a hollow adjusting air ring is processed through an injection molding process, air is filled into the adjusting air ring, a sleeve with the outer diameter smaller than that of the connecting hole is selected, the adjusting air ring is sleeved on the sleeve and is clamped between the edge of the connecting hole and the sleeve, the sleeve is expanded at two ends of the sleeve by using an expanding process to form a pressure regulating gasket, and the expanded part is pressed on the connecting plate to realize the assembling of the pressure regulating gasket and the connecting hole; the method comprises the steps of sleeving a pin bolt with a first pressure spring, penetrating the pin bolt through a left clamping plate, sleeving the pin bolt with a second pressure spring, penetrating the pin bolt through a left pressing plate, penetrating the pin bolt through a mounting hole and a right pressing plate on a pressure regulating gasket, sleeving the pin bolt with a third pressure spring, penetrating the pin bolt through a right clamping plate, sleeving the pin bolt with a fourth pressure spring, screwing a fastening bolt on the pin bolt, and completing the assembling operation of the step 2).

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