Intelligent valve with self-maintenance function

Abstract

The invention relates to the technical field of valves, and provides an intelligent valve with a self-maintenance function, the intelligent valve comprises a valve body and a water outlet fixedly connected with the inner wall of the valve body, the top of the valve body is fixedly connected with a valve cover through a bolt, a valve rod penetrates through the top of the valve cover, and the valve rod is in threaded connection with the top of the valve cover; by changing the cavity and adjusting the volume of the inner cavity of the box, oil circulation is achieved, heat generated in the moving process of the valve rod is circularly dissipated while the valve rod is lubricated, deformation of the valve rod caused by overheating is prevented, in the oil circulation process, chippings generated by friction between the valve rod and the valve cover are taken away by oil flowing, and the valve cover is prevented from being damaged. And chippings are prevented from entering the threaded connection part of the valve rod and the valve cover to influence the movement smoothness of the valve rod.

Description

Technical Field

[0001] The invention relates to the technical field of valves, in particular to an intelligent valve with a self-maintenance function. Background Art

[0002] The stop valve, also known as the intercept valve, is one of the most widely used valves. The reason why it is so popular is that the friction between the sealing surfaces during opening and closing is small, it is relatively durable, the opening height is not large, it is easy to manufacture and maintain, and it is not only suitable for medium and low pressures, but also for high pressures. The closing principle of the stop valve is to rely on the valve stem pressure to make the valve disc sealing surface fit closely with the valve seat sealing surface to prevent the flow of the medium.

[0003] The valve stem of the existing stop valve is threadedly connected to the valve body. When the valve stem moves up and down, friction occurs between the valve stem and the valve cover, which can easily generate high temperature and cause the valve stem to deform. The verticality of the valve stem is affected, which in turn affects the closure of the valve plug and the water outlet. At the same time, friction can easily cause debris to form at the threaded connection between the valve stem and the valve cover. The debris is adsorbed on the valve stem, causing the valve stem to rotate unsmoothly. Impurities are easily attached to the surface of the valve plug. If they are not cleaned in time, the impurities will affect the closing and sealing of the valve plug and the water outlet. Summary of the invention

[0004] The present invention provides an intelligent valve with a self-maintenance function, which solves the problems in the background technology that friction between a valve stem and a valve cover easily generates high temperature and causes deformation of the valve stem, etc. through an oil circulation component and a cleaning component.

[0005] The technical solution of the present invention is as follows:

[0006] A smart valve with a self-maintenance function comprises a valve body, a water outlet fixedly connected to the inner wall of the valve body, a valve cover fixedly connected to the top of the valve body by bolts, a valve stem vertically passing through the top of the valve cover, the valve stem is threadedly connected to the top of the valve cover, one end of the valve stem vertically passing through the top of the valve cover extends out of the bottom of the valve cover and is threadedly connected to the bottom of the valve cover, one end of the valve stem extending out of the bottom of the valve cover is rotatably connected to a moving block, a runner is fixedly connected to the top of the valve stem, an oil circulation assembly is fixedly connected to the valve cover, and a cleaning assembly is fixedly connected to the bottom of the moving block.

[0007] Furthermore, the oil circulation component includes a diaphragm, the inner ring of the diaphragm is fixedly connected to the side wall of the moving block, the outer ring of the diaphragm is fixedly connected to the bottom of the inner wall of the valve cover, and the diaphragm and the inner wall of the bottom of the valve cover form a cavity.

[0008] Furthermore, an adjusting box is fixedly connected to one side of the valve cover, and the adjusting box includes a bottom box and a top box threadedly connected to the bottom box, the side wall of the bottom box is fixedly connected to the side wall of the valve cover, the interior of the bottom box is communicated with the interior of the valve cover through a pipeline, a mounting groove is provided on the top of the inner wall of the bottom box, and a limit plate is symmetrically fixedly connected to the inner wall of the bottom box, a filter bin is arranged inside the bottom box, the top edge of the filter bin is fitted with the mounting groove, the side wall of the filter bin is fitted with the limit plate, and the top edge of the filter bin is fitted with the bottom of the top box;

[0009] A piston plate is slidably mounted inside the top box, a first spring is fixedly connected to the top of the piston plate, one end of the first spring is fixedly connected to the top of the inner wall of the top box, and a ventilation hole is opened on the top of the top box.

[0010] Furthermore, a first through hole is formed at the bottom of the inner wall of the bottom box, a second through hole is formed at the bottom of the inner wall of the valve cover, and a first movable valve and a second movable valve are respectively disposed at the top of the first through hole and the bottom of the second through hole;

[0011] The first movable valve and the second movable valve each include a plurality of limit rods, the top ends of the plurality of limit rods are fixedly connected with a stopper, the plurality of limit rods are slidably connected with a valve block, a second spring is arranged between the valve block and the stopper, and the two ends of the second spring are respectively fixedly connected with the valve block and the stopper.

[0012] Furthermore, a feed pipe is fixedly connected to the inner wall of the valve cover, and the feed pipe is communicated with the inner cavity of the valve cover. A discharge pipe is fixedly connected to the bottom of the inner wall of the bottom box, and the feed pipe is communicated with the inner cavity of the bottom box. One end of the feed pipe and the discharge pipe are both threadedly connected with a plug.

[0013] Furthermore, the cleaning assembly includes a pair of legs, the top of the pair of legs is fixedly connected to the bottom of the moving block, a spherical plug is arranged between the pair of legs, both sides of the spherical plug are fixedly connected with an axle rod, one end of the axle rod horizontally passes through the legs and is rotatably connected to the legs, and one end of the axle rod horizontally passes through the legs and is fixedly connected to a gear.

[0014] Furthermore, a rack is fixedly connected to the inner wall of the valve body, and the rack is meshed with the gear.

[0015] Furthermore, a cross bar is fixedly connected between the pair of legs, a pair of positioning rods vertically penetrate the top of the cross bar, the positioning rods are slidably connected to the cross bar, one end of the positioning rod vertically penetrating the top of the cross bar is fixedly connected to an arc-shaped member, a plurality of bristles are fixedly connected to the bottom of the arc-shaped member, the bristles are in contact with the outer wall of the spherical plug, a third spring is provided on the outer periphery of the positioning rod, and both ends of the third spring are respectively fixedly connected to the bottom of the cross bar and the top of the arc-shaped member.

[0016] Compared with the prior art, the present invention has the following beneficial effects:

[0017] 1. The present invention realizes oil circulation by changing the volume of the cavity and the inner cavity of the regulating box through the oil in the inner cavity of the valve cover, the cavity and the inner cavity of the regulating box under the cooperation of the first movable valve and the second movable valve. While lubricating the valve stem, it also circulates and dissipates the heat generated during the movement of the valve stem to prevent the valve stem from overheating and deformation. In addition, during the oil circulation process, the oil flow carries away the debris generated by the friction between the valve stem and the valve cover, preventing the debris from entering the threaded connection between the valve stem and the valve cover and affecting the smoothness of the movement of the valve stem. The debris is isolated and processed by the filter bin, thereby ensuring the cleanliness of the oil and increasing the service life of the oil.

[0018] 2. The present invention cleans impurities on the surface of the spherical plug by rotating the spherical plug in conjunction with the bristles, thereby preventing impurities adhering to the surface of the spherical plug from affecting the sealing effect of the closure of the spherical plug and the water outlet. At the same time, the bristles are always in contact with the surface of the spherical plug under the push of the third spring, thereby preventing the front end of the bristles from being worn, resulting in insufficient contact between the bristles and the surface of the spherical plug, and affecting the cleaning effect of impurities on the surface of the spherical plug. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 It is a three-dimensional schematic diagram of the appearance of the present invention;

[0020] Figure 2 It is a cross-sectional schematic diagram of the present invention;

[0021] Figure 3 The present invention Figure 2 A magnified schematic diagram of the oil circulation assembly at point A;

[0022] Figure 4 is an exploded view of the structure of the oil circulation assembly of the present invention;

[0023] Figure 5 The present invention Figure 3 Enlarged schematic diagram of point B;

[0024] Figure 6 is a three-dimensional schematic diagram of the cleaning assembly of the present invention;

[0025] Figure 7 It is a disassembly diagram of the cleaning assembly components of the present invention.

[0026] In the figure:

[0027] 1. Valve body; 2. Water outlet; 3. Valve cover; 301. Feed pipe; 4. Valve stem; 5. Moving block; 6. Rotor; 7. Oil circulation assembly; 701. Diaphragm; 7011. Cavity; 702. Adjustment box; 703. Bottom box; 704. Top box; 705. Mounting groove; 706. Limit plate; 707. Filter bin; 708. Piston plate; 709. First spring; 710. Ventilation hole; 711. First through hole; 712. Second Through hole; 713, first movable valve; 714, second movable valve; 715, limit rod; 716, stopper; 717, valve block; 718, second spring; 719, discharge pipe; 8, cleaning assembly; 801, support leg; 802, ball plug; 803, shaft rod; 804, gear; 805, rack; 806, cross bar; 807, positioning rod; 808, arc-shaped member; 809, bristles; 810, third spring; 9, plug. DETAILED DESCRIPTION

[0028] The following embodiments of the present invention are described in further detail in conjunction with the accompanying drawings and examples. The following examples are used to illustrate the present invention, but are not intended to limit the scope of the present invention.

[0029] The present invention provides an intelligent valve with a self-maintenance function, comprising a valve body 1, a water outlet 2 fixedly connected to the inner wall of the valve body 1, a valve cover 3 fixedly connected to the top of the valve body 1 by bolts, a valve stem 4 vertically penetrates the top of the valve cover 3, the valve stem 4 is threadedly connected to the top of the valve cover 3, one end of the valve stem 4 vertically penetrates the top of the valve cover 3 and extends out of the bottom of the valve cover 3, and is threadedly connected to the bottom of the valve cover 3, one end of the valve stem 4 extending out of the bottom of the valve cover 3 is rotatably connected to a moving block 5, a runner 6 is fixedly connected to the top of the valve stem 4, an oil circulation component 7 is fixedly connected to the valve cover 3, and a cleaning component 8 is fixedly connected to the bottom of the moving block 5;

[0030] The oil circulation component 7 includes a diaphragm 701 , the inner ring of the diaphragm 701 is fixedly connected to the side wall of the moving block 5 , the outer ring of the diaphragm 701 is fixedly connected to the bottom of the inner wall of the valve cover 3 , and the diaphragm 701 and the bottom inner wall of the valve cover 3 form a cavity 7011 .

[0031] A regulating box 702 is fixedly connected to one side of the valve cover 3, and the regulating box 702 includes a bottom box 703 and a top box 704 threadedly connected to the bottom box 703. The side wall of the bottom box 703 is fixedly connected to the side wall of the valve cover 3, and the interior of the bottom box 703 is communicated with the interior of the valve cover 3 through a pipeline. A mounting groove 705 is provided on the top of the inner wall of the bottom box 703, and a limiting plate 706 is symmetrically fixedly connected to the inner wall of the bottom box 703. A filter bin 707 is arranged inside the bottom box 703, and the top edge of the filter bin 707 is fitted with the mounting groove 705, the side wall of the filter bin 707 is fitted with the limiting plate 706, and the top edge of the filter bin 707 is fitted with the bottom of the top box 704;

[0032] A piston plate 708 is slidably mounted inside the top box 704 , a first spring 709 is fixedly connected to the top of the piston plate 708 , one end of the first spring 709 is fixedly connected to the top of the inner wall of the top box 704 , and a ventilation hole 710 is opened on the top of the top box 704 .

[0033] The bottom inner wall of the bottom box 703 is provided with a first through hole 711, the bottom inner wall of the valve cover 3 is provided with a second through hole 712, and the top of the first through hole 711 and the bottom of the second through hole 712 are provided with a first movable valve 713 and a second movable valve 714 respectively;

[0034] The first movable valve 713 and the second movable valve 714 each include a plurality of limit rods 715, the top ends of the plurality of limit rods 715 are fixedly connected with a stopper 716, the plurality of limit rods 715 are slidably connected with a valve block 717, a second spring 718 is provided between the valve block 717 and the stopper 716, and the two ends of the second spring 718 are fixedly connected with the valve block 717 and the stopper 716, respectively.

[0035] A feed pipe 301 is fixedly connected to the inner wall of the valve cover 3, and the feed pipe 301 is communicated with the inner cavity of the valve cover 3. A discharge pipe 719 is fixedly connected to the bottom of the inner wall of the bottom box 703, and the feed pipe 301 is communicated with the inner cavity of the bottom box 703. One end of the feed pipe 301 and the discharge pipe 719 are both threadedly connected with a plug (9).

[0036] The cleaning assembly 8 includes a pair of legs 801, the top of the pair of legs 801 is fixedly connected to the bottom of the moving block 5, a spherical plug 802 is arranged between the pair of legs 801, both sides of the spherical plug 802 are fixedly connected with an axle rod 803, one end of the axle rod 803 horizontally penetrates the legs 801 and is rotatably connected to the legs 801, and one end of the axle rod 803 horizontally penetrates the legs 801 and is fixedly connected with a gear 804.

[0037] A rack 805 is fixedly connected to the inner wall of the valve body 1 , and the rack 805 is meshed with the gear 804 .

[0038] A cross bar 806 is fixedly connected between a pair of legs 801, a pair of positioning rods 807 vertically penetrate the top of the cross bar 806, the positioning rods 807 are slidably connected to the cross bar 806, one end of the positioning rod 807 vertically penetrates the top of the cross bar 806 and is fixedly connected to an arc-shaped component 808, a plurality of bristles 809 are fixedly connected to the bottom of the arc-shaped component 808, the bristles 809 are in contact with the outer wall of the spherical plug 802, a third spring 810 is sleeved on the outer periphery of the positioning rod 807, and the two ends of the third spring 810 are respectively fixedly connected to the bottom of the cross bar 806 and the top of the arc-shaped component 808.

[0039] Embodiment 1: Figure 1-7 As shown, in this embodiment, the valve is first placed horizontally, the two ends of the valve body 1 are connected to the water pipe, the plug 9 threadedly connected to one end of the feed pipe 301 is opened, and oil is injected into the inner cavity of the valve cover 3 through the feed pipe 301, so that the oil fully fills the inner cavity of the valve cover 3 and the inner cavity of the regulating box 702, and the oil pushes the piston plate 708 upward, so that the first spring 709 is compressed, thereby increasing the volume of the inner cavity of the regulating box 702, and then, the rotating wheel 6 is rotated to make the valve stem 4 move downward, thereby driving the moving block 5 to move downward, and then the inner ring of the diaphragm 701 moves downward, so that the volume of the cavity 7011 increases, thereby generating a negative pressure in the cavity 7011, and under the negative pressure Under the influence, the oil in the inner cavity of the valve cover 3 flows into the first through hole 711 and squeezes the valve block 717 of the first movable valve 713, so that the valve block 717 moves along the limit rod 715 toward the stop block 716. At the same time, the second spring 718 is compressed. At this time, the first movable valve 713 is in an open state, and the oil in the inner cavity of the valve cover 3 enters the cavity 7011. The oil level in the inner cavity of the valve cover 3 drops, and the first spring 709 rebounds and pushes the piston plate 708 to move downward, pushing the oil in the inner cavity of the regulating box 702 to the inner cavity of the valve cover 3 through the pipeline. When the volume of the cavity 7011 is the largest and the oil in the inner cavity of the valve cover 3 is fully filled, it indicates that the oil filling work is completed;

[0040] When the rotating wheel 6 is rotated so that the valve stem 4 drives the moving block 5 to move upward, the first movable valve 713 is in a closed state, and the internal volume of the cavity 7011 is reduced, thereby increasing the pressure in the cavity 7011, and then causing the oil in the cavity 7011 to flow to the second through hole 712 and impact the valve block 717 of the second movable valve 714, so that the second movable valve 714 is in an open state, and the oil in the cavity 7011 enters the inner cavity of the regulating box 702 through the second through hole 712, and the filter bin 707 outside the second through hole 712 will filter the oil flowing to the inner cavity of the regulating box 702, thereby isolating the debris generated by the friction during the movement of the valve stem 4 in the oil. At this time, the oil in the inner cavity of the valve cover 3 is fully filled, so that the pressure of the oil flowing from the cavity 7011 to the inner cavity of the regulating box 702 increases, thereby lifting the piston plate 708 to move upward, and then expanding the volume of the inner cavity of the regulating box 702;

[0041] When the waste oil needs to be replaced, the plug 9 threadedly connected to one end of the discharge pipe 719 is opened to drain the waste oil. After the waste oil is drained, the top box 704 is rotated to separate it from the bottom box 703, the filter bin 707 is taken out, the filter bin 707 is rinsed to make the through holes on the surface of the filter bin 707 unblocked, and the debris particles deposited in the bottom box 703 are processed, and then the cleaned filter bin 707 is inserted into the bottom box 703, and the side walls of the filter bin 707 are attached to the limit plates 706 on both sides, and the top edge of the filter bin 707 is attached to the installation groove 705, and then the top box 704 is rotated to be threadedly connected to the bottom box 703, and the top edge of the filter bin 707 is attached to the bottom of the top box 704, so that the filter bin 707 is fixed, and then new oil is poured;

[0042] As can be seen from the above, during the up and down movement of the valve stem 4, the oil in the inner cavity of the valve cover 3, the cavity 7011 and the inner cavity of the regulating box 702, with the cooperation of the first movable valve 713 and the second movable valve 714, realizes oil circulation by changing the volume of the inner cavity of the cavity 7011 and the regulating box 702. While lubricating the valve stem 4, it also circulates and dissipates the heat generated during the movement of the valve stem 4 to prevent the valve stem 4 from overheating and deformation. In addition, during the oil circulation process, the oil flow carries away the debris generated by the friction between the valve stem 4 and the valve cover 3, preventing the debris from entering the threaded connection between the valve stem 4 and the valve cover 3 and affecting the smoothness of the movement of the valve stem 4. The debris is isolated and processed by the filter bin 707, thereby ensuring the cleanliness of the oil and increasing the service life of the oil.

[0043] Embodiment 2: Figure 1-7 As shown, in this embodiment, when the valve stem 4 drives the moving block 5 to move up and down, the moving block 5 drives the spherical plug 802 to move up and down through a pair of legs 801, and the opening and closing of the valve is realized by closing the spherical plug 802 and the water outlet 2. The spherical plug 802 is rotatably connected to the pair of legs 801 through the shaft 803 fixedly connected on both sides, and the gear 804 fixedly connected to one end of the leg 801 through the shaft 803 is meshed with the rack 805 set on the inner wall of the valve body 1, so that the spherical plug 802 moves up and down When the ball plug 802 is rotated, the bristles 809 on the ball plug 802 are used to clean the impurities on the surface of the ball plug 802. The bristles 809 are fixedly connected to the arc-shaped member 808, the arc-shaped member 808 is fixedly connected to the positioning rod 807, the positioning rod 807 is slidably connected to the cross bar 806, and the third spring 810 is sleeved on the periphery of the positioning rod 807. The third spring 810 always pushes the arc-shaped member 808 toward the ball plug 802, so that the bristles 809 always fit the surface of the ball plug 802.

[0044] From the above, it can be seen that during the up and down movement of the valve stem 4, that is, during the opening and closing of the valve, the spherical plug 802 rotates to cooperate with the bristles 809 to clean the impurities on the surface of the spherical plug 802, thereby preventing the impurities attached to the surface of the spherical plug 802 from affecting the sealing effect of the closure of the spherical plug 802 and the water outlet 2. At the same time, the bristles 809 are always in contact with the surface of the spherical plug 802 under the push of the third spring 810, thereby preventing the front end of the bristles 809 from being worn, resulting in insufficient contact between the bristles 809 and the surface of the spherical plug 802, thereby affecting the cleaning effect of the impurities on the surface of the spherical plug 802.

[0045] The embodiments of the present invention are provided for the purpose of illustration and description. Although the embodiments of the present invention have been shown and described above, it can be understood that the above embodiments are exemplary and cannot be understood as limitations of the present invention. Ordinary technicians in this field can change, modify, replace and modify the above embodiments within the scope of the present invention.

Claims

1. An intelligent valve with a self-maintenance function, comprising a valve body (1) and a water outlet (2) fixedly connected to the inner wall of the valve body (1), characterized in that: The top of the valve body (1) is fixedly connected to a valve cover (3) by bolts, a valve stem (4) vertically penetrates the top of the valve cover (3), the valve stem (4) is threadedly connected to the top of the valve cover (3), one end of the valve stem (4) vertically penetrates the top of the valve cover (3) extends out of the bottom of the valve cover (3) and is threadedly connected to the bottom of the valve cover (3), one end of the valve stem (4) extending out of the bottom of the valve cover (3) is rotatably connected to a moving block (5), the top of the valve stem (4) is fixedly connected to a rotating wheel (6), the valve cover (3) is fixedly connected to an oil circulation component (7), and the bottom of the moving block (5) is fixedly connected to a cleaning component (8).

2. The intelligent valve with self-maintenance function as claimed in claim 1, characterized in that: The oil circulation component (7) comprises a diaphragm (701), the inner ring of the diaphragm (701) is fixedly connected to the side wall of the moving block (5), the outer ring of the diaphragm (701) is fixedly connected to the bottom of the inner wall of the valve cover (3), and the diaphragm (701) and the inner wall of the bottom of the valve cover (3) form a cavity (7011).

3. The intelligent valve with self-maintenance function as claimed in claim 2, characterized in that: A regulating box (702) is fixedly connected to one side of the valve cover (3), and the regulating box (702) comprises a bottom box (703) and a top box (704) threadedly connected to the bottom box (703); the side wall of the bottom box (703) is fixedly connected to the side wall of the valve cover (3); the interior of the bottom box (703) is communicated with the interior of the valve cover (3) through a pipeline; a mounting groove (705) is provided at the top of the inner wall of the bottom box (703); a limit plate (706) is symmetrically fixedly connected to the inner wall of the bottom box (703); a filter bin (707) is provided inside the bottom box (703); the top edge of the filter bin (707) is in contact with the mounting groove (705); the side wall of the filter bin (707) is in contact with the limit plate (706); and the top edge of the filter bin (707) is in contact with the bottom of the top box (704); A piston plate (708) is slidably mounted inside the top box (704), a first spring (709) is fixedly connected to the top of the piston plate (708), one end of the first spring (709) is fixedly connected to the top of the inner wall of the top box (704), and a ventilation hole (710) is opened on the top of the top box (704).

4. The intelligent valve with self-maintenance function as claimed in claim 3, characterized in that: A first through hole (711) is provided at the bottom of the inner wall of the bottom box (703), a second through hole (712) is provided at the bottom of the inner wall of the valve cover (3), and a first movable valve (713) and a second movable valve (714) are provided at the top of the first through hole (711) and the bottom of the second through hole (712), respectively; The first movable valve (713) and the second movable valve (714) each include a plurality of limit rods (715), the top ends of the plurality of limit rods (715) are fixedly connected to a stopper (716), the plurality of limit rods (715) are slidably connected to a valve block (717), a second spring (718) is provided between the valve block (717) and the stopper (716), and the two ends of the second spring (718) are fixedly connected to the valve block (717) and the stopper (716), respectively.

5. The intelligent valve with self-maintenance function as claimed in claim 4, characterized in that: A feed pipe (301) is fixedly connected to the inner wall of the valve cover (3), and the feed pipe (301) is communicated with the inner cavity of the valve cover (3). A discharge pipe (719) is fixedly connected to the bottom of the inner wall of the bottom box (703), and the feed pipe (301) is communicated with the inner cavity of the bottom box (703). One end of the feed pipe (301) and the discharge pipe (719) are both threadedly connected to a plug (9).

6. The intelligent valve with self-maintenance function as claimed in claim 1, characterized in that: The cleaning assembly (8) comprises a pair of legs (801), the top of the pair of legs (801) being fixedly connected to the bottom of the moving block (5), a spherical plug (802) being arranged between the pair of legs (801), both sides of the spherical plug (802) being fixedly connected to an axle rod (803), one end of the axle rod (803) horizontally passing through the legs (801) and being rotatably connected to the legs (801), and one end of the axle rod (803) horizontally passing through the legs (801) being fixedly connected to a gear (804).

7. The intelligent valve with self-maintenance function as claimed in claim 1, characterized in that: A rack (805) is fixedly connected to the inner wall of the valve body (1), and the rack (805) is meshed with the gear (804).

8. The intelligent valve with self-maintenance function as claimed in claim 6, characterized in that: A cross bar (806) is fixedly connected between the pair of legs (801), a pair of positioning rods (807) vertically penetrate the top of the cross bar (806), the positioning rods (807) are slidably connected to the cross bar (806), one end of the positioning rod (807) vertically penetrates the top of the cross bar (806) and is fixedly connected to an arc-shaped component (808), a plurality of bristles (809) are fixedly connected to the bottom of the arc-shaped component (808), the bristles (809) are in contact with the outer wall of the spherical plug (802), a third spring (810) is sleeved on the periphery of the positioning rod (807), and the two ends of the third spring (810) are respectively fixedly connected to the bottom of the cross bar (806) and the top of the arc-shaped component (808).

Images