Manual and automatic integrated control valve

Abstract

The utility model relates to the technical field of control valves, in particular to a manual-automatic integrated control valve which comprises a valve body and a circular liquid flow channel arranged in the valve body, a rectangular sliding groove perpendicular to the circular liquid flow channel is further formed in the valve body, the width of the rectangular sliding groove is larger than the diameter of the circular liquid flow channel, and the rectangular sliding groove is communicated with the circular liquid flow channel. A gate plate assembly is slidably connected into the rectangular sliding groove. The bottom of the valve body is connected with a sealing cover assembly for blocking a lower opening of the rectangular sliding groove, the top of the valve body is connected with a circular sealing seat assembly for blocking an upper opening of the rectangular sliding groove, a sliding rod is slidably connected into the circular sealing seat assembly, and the lower end of the sliding rod is connected with the flashboard assembly. An automatic telescopic rod assembly is connected to the mounting frame, the extending end of the automatic telescopic rod assembly is connected with the upper end of the sliding rod, and the manual driving mechanism is suitable for driving the sliding rod to move axially. The device is reasonable in structure, the operation convenience is enhanced, and the use effect is improved.

Description

TECHNICAL FIELD

[0001] The utility model relates to control valve technical field, especially to a hand -self -control valve. BACKGROUND

[0002] Control valve plays a vital role in the industrial production process, and is widely used in petroleum, chemical industry, electric power, metallurgy and many other fields, for controlling the flow, pressure and direction of fluid parameters. With the continuous development of industrial technology, the performance requirements of control valve are also increasing.

[0003] For the related technology in the above, the inventor finds that when the control valve is used in a larger pipeline system, a larger force needs to be applied during the opening and closing process of the control valve. Under normal circumstances, the control valve will use an automatic telescopic rod as a power source, which can reduce the labor intensity of workers. However, when the automatic telescopic rod fails, the control valve cannot be controlled, which reduces the use effect of the control valve. UTILITY MODEL CONTENT

[0004] The technical problem solved by the utility model is to provide a hand -self -control valve, which enhances the convenience of operation and improves the use effect.

[0005] To solve the above technical problems, one technical scheme of the utility model is to provide a hand -self -control valve, which comprises: a valve body and a circular liquid flow channel arranged in the valve body, a rectangular sliding groove perpendicular to the circular liquid flow channel is further arranged in the valve body, the width of the rectangular sliding groove is greater than the diameter of the circular liquid flow channel and is connected thereto, and a gate plate assembly is slidably connected in the rectangular sliding groove.

[0006] A sealing cover assembly is connected to the bottom of the valve body to block the lower opening of the rectangular sliding groove, a circular sealing seat assembly is connected to the top of the valve body to block the upper opening of the rectangular sliding groove, a sliding rod is slidably connected in the circular sealing seat assembly, the lower end of the sliding rod is connected to the gate plate assembly, an installation frame is connected to the upper plane of the valve body, an automatic telescopic rod assembly is connected to the installation frame, the extension end of the automatic telescopic rod assembly is connected to the upper end of the sliding rod, and a manual driving mechanism is further included, which is suitable for driving the axial movement of the sliding rod.

[0007] The manual driving mechanism comprises a rack and a gear meshed and connected with the rack, a T-shaped mounting seat is connected to the installation frame, a rotating shaft is provided in the T-shaped mounting seat, one end of the rotating shaft is provided in the center hole of the gear and connected through a key, and the other end is connected with a circular handle.

[0008] By adopting the technical scheme, in use, the hand-automatic control valve is installed in the pipeline system, the automatic telescopic rod assembly is operated to drive the gate assembly to slide upward in the rectangular sliding groove, the gate assembly can block the circular liquid flow channel, the purpose of closing is realized, the automatic telescopic rod assembly is operated to drive the gate assembly to slide downward in the rectangular sliding groove, the circular liquid flow channel is in an open state, the purpose of opening the control valve is realized, the automatic telescopic rod assembly is used as a power source to drive the gate assembly to move, the labor intensity of workers is reduced, when the automatic telescopic rod assembly needs to be repaired due to failure, the automatic telescopic rod assembly is disassembled for repair, the circular handle is rotated to drive the rotating shaft to rotate, the rotating shaft drives the gear to rotate, the gear drives the rack to move linearly, the rack drives the gate assembly to slide in the rectangular sliding groove through the sliding rod, so that the opening and closing of the circular liquid flow channel are realized, the convenience of operation is enhanced, and the use effect is improved.

[0009] In a preferred example, the gate assembly further comprises a gate body, a circular through hole is arranged on the gate body, a circular blind hole one is arranged on one side of the gate body below the circular through hole, a circular blind hole two concentric with the circular blind hole one is arranged on the other side of the gate body, a circular sealing plate is arranged in each of the circular blind hole one and the circular blind hole two, a plurality of through holes are arranged in the end of the inner cavity of the circular blind hole one in an annular array, a guide rod is slidably connected in each of the through holes, and the length of the guide rod is greater than the distance between the circular blind hole one and the circular blind hole two.

[0010] When the circular through hole on the gate body is communicated with the circular liquid flow channel, the fluid in the pipeline system flows into the circular liquid flow channel, and the control valve is in an open state, when the gate body moves upward by a distance, the circular blind hole one and the circular blind hole two are concentric with the circular liquid flow channel, the fluid enters the inner cavity of the circular liquid flow channel, and the fluid can be blocked by the action of the gate body, so that the purpose of closing the control valve is realized, the fluid contacts the circular sealing plate at one end of the guide rod, the fluid applies a certain force to the circular sealing plate, so that the circular sealing plate at the other end of the guide rod is tightly contacted with the inner wall of the rectangular sliding groove, the secondary blocking of the fluid is realized, and the blocking effect of the gate assembly on the circular liquid flow channel is enhanced.

[0011] In a preferred example, the circular sealing plate comprises a circular sealing plate, an annular groove one is concentrically arranged at one end of the circular sealing plate away from the guide rod, a wear-resistant sealing ring one is arranged in the annular groove one, and the inner diameter of the wear-resistant sealing ring one is greater than the diameter of the circular liquid flow channel.

[0012] Through the adoption of the above technical scheme, the circular plugging plate is moved to drive the wear-resistant sealing ring I to be in close contact with the inner wall of the rectangular sliding groove, and the use effect of the control valve is enhanced.

[0013] In a preferred example, the automatic telescopic rod assembly can be further configured as: the oil cylinder is fixed on the mounting frame, and the extending rod of the oil cylinder is connected with the upper end of the sliding rod through the sleeve connector.

[0014] Through the adoption of the above technical scheme, the extending rod of the oil cylinder is extended and retracted to drive the sliding rod and the gate assembly to move in the rectangular sliding groove, and the oil cylinder is conveniently installed and disassembled through the use of the sleeve connector.

[0015] In a preferred example, the sleeve connector can be further configured as: the sleeve connector comprises a circular ring clamping groove I arranged on the extending rod of the oil cylinder and a circular ring clamping groove II arranged on the outer circle of the upper end of the sliding rod, further comprises a fixed plate and U-shaped plates connected to the upper and lower ends of the fixed plate respectively, the U-shaped plate at the upper end is sleeved in the circular ring clamping groove I, the U-shaped plate at the lower end is sleeved in the circular ring clamping groove II, and the two U-shaped plates are detachably connected by a limiting plate at the ends away from the fixed plate.

[0016] Through the adoption of the above technical scheme, the U-shaped plate at the upper end is sleeved in the circular ring clamping groove I, the U-shaped plate at the lower end is sleeved in the circular ring clamping groove II, and the two U-shaped plates are connected by the limiting plate through bolts, which facilitates installation and disassembly and improves the convenience of operation.

[0017] In a preferred example, the sealing cover assembly can be further configured as: the sealing cover assembly comprises a sealing cover body, an annular groove II is arranged on the sealing cover body, a rubber sealing ring I is arranged in the inner cavity of the annular groove II, the rubber sealing ring I is tightly connected with the sealing cover body, a plurality of bolts are arranged in the annular array on the sealing cover body, and the bolts are screwedly arranged on the valve body.

[0018] Through the adoption of the above technical scheme, the sealing cover body is in close contact with the valve body through the bolts, and the use of the rubber sealing ring I prevents the fluid in the rectangular sliding groove from flowing out through the gap between the sealing cover body and the valve body, and the sealing property is enhanced.

[0019] In a preferred example, the circular sealing seat assembly can be further configured as: the circular sealing seat assembly comprises a circular sealing seat body, an annular groove III is arranged on the lower end surface of the circular sealing seat body, a rubber sealing ring II is arranged in the inner cavity of the annular groove III, the rubber sealing ring II is tightly connected with the valve body, an annular groove IV is arranged on the inner hole wall of the circular sealing seat body, a wear-resistant sealing ring II is arranged in the inner cavity of the annular groove IV, and the wear-resistant sealing ring II is sleeved on the outer circle of the sliding rod and is in sliding connection.

[0020] By adopting the above technical scheme, the rubber sealing ring two is used to prevent the fluid in the rectangular sliding groove from flowing out through the gap between the circular sealing seat body and the valve body, and the wear-resistant sealing ring two is used to prevent the fluid from flowing out through the gap between the sliding rod and the circular sealing seat body, thereby enhancing the sealing performance.

[0021] In summary, the utility model has at least one of the following beneficial technical effects:

[0022] 1. The automatic telescopic rod assembly is operated to drive the shutter assembly to slide in the rectangular sliding groove, so that the shutter assembly can block and open the circular liquid flow channel, and the automatic telescopic rod assembly is used as a power source to drive the shutter assembly to move, thereby reducing the labor intensity of workers.

[0023] 2. When the automatic telescopic rod assembly needs to be repaired due to failure, the automatic telescopic rod assembly is disassembled for repair, the circular handle is rotated to drive the rotating shaft to rotate, the rotating shaft drives the gear to rotate, the gear drives the rack to linearly move, and the rack drives the shutter assembly to slide in the rectangular sliding groove through the sliding rod, so that the circular liquid flow channel is opened and closed, the operation convenience is enhanced, and the use effect is improved. BRIEF DESCRIPTION OF DRAWINGS

[0024] In order to more clearly illustrate the technical solutions in the embodiments of the utility model, the following will briefly introduce the drawings needed to be used in the embodiment description. Obviously, the drawings in the following description are only some embodiments of the utility model, and for those skilled in the art, other drawings can also be obtained from these drawings without creative labor, wherein:

[0025] Figure 1 is a structure schematic view of a preferred embodiment of the utility model one hand-automatic control valve.

[0026] Figure 2 is Figure 1 A-A line section view in the utility model.

[0027] Figure 3 is Figure 2 Structure schematic view of the valve body in the utility model.

[0028] Figure 4 is Figure 2 Sectional view of the shutter assembly in the utility model.

[0029] Figure 5 is Figure 2 Structure schematic view of the connection of the fixed plate, the U-shaped plate and the limiting plate in the utility model.

[0030] In the figure: 1, valve body; 2, circular liquid flow channel; 30, gate assembly; 4, rectangular sliding groove; 50, sealing cover assembly; 60, circular sealing seat assembly; 70, automatic telescopic rod assembly; 80, manual driving mechanism; 9, sliding rod; 11, mounting frame;

[0031] 31, gate body; 32, circular through hole; 33, circular blind hole one; 34, circular blind hole two; 35, circular sealing plate; 36, through hole; 37, guide rod; 351, circular sealing plate; 352, annular groove one; 353, wear-resistant sealing ring one;

[0032] 51, sealing cover body; 52, annular groove two; 53, rubber sealing ring one;

[0033] 61, circular sealing seat body; 62, annular groove three; 63, rubber sealing ring two; 64, annular groove four;

[0034] 65, wear-resistant sealing ring two;

[0035] 71, oil cylinder; 72, sleeve connecting piece; 721, circular ring clamping groove one; 722, circular ring clamping groove two; 723, fixed plate; 724, U-shaped plate; 725, limiting plate;

[0036] 81, rack; 82, gear; 83, T-shaped mounting seat; 84, rotating shaft; 85, circular handle. DETAILED DESCRIPTION

[0037] The preferred embodiments of the present application will be described below with reference to the accompanying drawings. It should be understood that the preferred embodiments described herein are merely intended to illustrate and explain the present application, and are not intended to limit the present application.

[0038] It should be noted that these drawings are simplified schematic diagrams, and only illustrate the basic structure of the present application in a schematic manner, and therefore only show the relevant components of the present application.

[0039] Reference Figures 1 to 5 The utility model discloses a kind of hand self-control valve, comprising: valve body 1 and the circular liquid flow channel 2 being set in valve body 1, valve body 1 still is equipped with the rectangular sliding groove 4 being perpendicular to circular liquid flow channel 2, the width of rectangular sliding groove 4 is greater than the diameter of circular liquid flow channel 2 and is connected, and rectangular sliding groove 4 is slidably connected with gate assembly 30.

[0040] The bottom of the valve body 1 is connected with a sealing cover assembly 50 sealing the lower opening of the rectangular sliding groove 4, which comprises a sealing cover body 51, and an annular groove two 52 is arranged on the sealing cover body 51, and a rubber sealing ring one 53 is arranged in the inner cavity of the annular groove two 52, and the rubber sealing ring one 53 is tightly connected with the sealing cover body 51, and a plurality of bolts are arranged in the annular array on the sealing cover body 51, and the bolts are screwed into the valve body 1; the sealing cover body 51 is tightly contacted with the valve body 1 through the bolts, and the use of the rubber sealing ring one 53 prevents the fluid in the rectangular sliding groove 4 from flowing out through the gap between the sealing cover body 51 and the valve body 1, thereby enhancing the sealing performance.

[0041] The top is connected with a circular sealing seat assembly 60 sealing the upper opening of the rectangular sliding groove 4, and a sliding rod 9 is slidably connected in the circular sealing seat assembly 60, and the lower end of the sliding rod 9 is connected with the gate assembly 30; the circular sealing seat assembly 60 comprises a circular sealing seat body 61, and an annular groove three 62 is arranged on the lower end surface of the circular sealing seat body 61, and a rubber sealing ring two 63 is arranged in the inner cavity of the annular groove three 62, and the rubber sealing ring two 63 is tightly connected with the valve body 1, and an annular groove four 64 is arranged on the inner hole wall of the circular sealing seat body 61, and a wear-resistant sealing ring two 65 is arranged in the inner cavity of the annular groove four 64, and the wear-resistant sealing ring two 65 is sleeved on the outer circle of the sliding rod 9 and is slidably connected; the use of the rubber sealing ring two 63 prevents the fluid in the rectangular sliding groove 4 from flowing out through the gap between the circular sealing seat body 61 and the valve body 1, and the use of the wear-resistant sealing ring two 65 prevents the fluid from flowing out through the gap between the sliding rod 9 and the circular sealing seat body 61, thereby enhancing the sealing performance.

[0042] The upper plane of the valve body 1 is connected with a mounting bracket 11, and the mounting bracket 11 is connected with an automatic telescopic rod assembly 70, and the extending end of the automatic telescopic rod assembly 70 is connected with the upper end of the sliding rod 9; the automatic telescopic rod assembly 70 comprises a oil cylinder 71 and a sleeve connector 72, the oil cylinder 71 is fixed on the mounting bracket 11, and the extending rod of the oil cylinder 71 is connected with the upper end of the sliding rod 9 through the sleeve connector 72; the telescopic rod of the oil cylinder 71 extends and retracts, thereby driving the sliding rod 9 and the gate assembly 30 to move in the rectangular sliding groove 4, and the use of the sleeve connector 72 facilitates the installation and disassembly of the oil cylinder 71.

[0043] It also comprises a manual driving mechanism 80 suitable for driving the axial movement of the sliding rod 9; the manual driving mechanism 80 comprises a rack 81 and a gear 82 meshingly connected with the rack 81, a T-shaped mounting seat 83 is connected on the mounting bracket 11, a rotating shaft 84 is arranged in the T-shaped mounting seat 83, one end of the rotating shaft 84 is arranged in the center hole of the gear 82 and is connected through a key, and the other end is connected with a circular handle 85.

[0044] The shutter assembly 30 comprises a shutter body 31, the shutter body 31 is provided with a circular through hole 32, one side of the shutter body 31 is provided with a circular blind hole I 33 below the circular through hole 32, the other side is provided with a circular blind hole II 34 concentric with the circular blind hole I 33, the circular blind hole I 33 and the circular blind hole II 34 are respectively provided with a circular sealing plate 35, the end of the inner cavity of the circular blind hole I 33 is provided with a plurality of through holes 36, the through holes 36 are respectively connected with guide rods 37, the two ends of the guide rods 37 are respectively connected with the corresponding circular sealing plate 35, the length of the guide rod 37 is greater than the distance between the circular blind hole I 33 and the circular blind hole II 34; when the circular through hole 32 on the shutter body 31 is communicated with the circular liquid flow channel 2, the fluid in the pipeline system flows into the circular liquid flow channel 2, and the control valve is in an open state; when the shutter body 31 moves upward by a distance, the circular blind hole I 33 and the circular blind hole II 34 are respectively concentric with the circular liquid flow channel 2, the fluid enters the inner cavity of the circular liquid flow channel 2, and the fluid can be sealed by the action of the shutter body 31, so that the purpose of closing the control valve is achieved; the fluid contacts the circular sealing plate 35 at one end of the guide rod 37, the fluid applies a certain force to the circular sealing plate 35, so that the circular sealing plate 35 at the other end of the guide rod 37 is tightly contacted with the inner wall of the rectangular sliding groove 4, and the fluid is sealed twice, so that the sealing effect of the shutter assembly 30 on the circular liquid flow channel 2 is enhanced.

[0045] The circular sealing plate 35 comprises a circular sealing plate 351, the circular sealing plate 351 is provided with an annular groove I 352 concentrically away from one end of the guide rod 37, the annular groove I 352 is provided with a wear-resistant sealing ring I 353, and the inner diameter of the wear-resistant sealing ring I 353 is greater than the diameter of the circular liquid flow channel 2; the circular sealing plate 351 moves to tightly contact the wear-resistant sealing ring I 353 with the inner wall of the rectangular sliding groove 4, so that the use effect of the control valve is enhanced.

[0046] The sleeve connecting piece 72 comprises a circular ring clamping groove I 721 arranged on the extension rod of the oil cylinder 71 and a circular ring clamping groove II 722 arranged on the outer circle of the upper end of the sliding rod 9, further comprises a fixed plate 723 and U-shaped plates 724 connected to the upper and lower ends of the fixed plate 723 respectively, the U-shaped plate 724 at the upper end is sleeved in the circular ring clamping groove I 721, the U-shaped plate 724 at the lower end is sleeved in the circular ring clamping groove II 722, and the two U-shaped plates 724 are detachably connected by a limiting plate 725 between the ends away from the fixed plate 723; the U-shaped plate 724 at the upper end is sleeved in the circular ring clamping groove I 721, the U-shaped plate 724 at the lower end is sleeved in the circular ring clamping groove II 722, and the two U-shaped plates 724 are connected by bolts between the limiting plate 725, so that the installation and disassembly are facilitated, and the operation convenience is improved.

[0047] The implementation principle of this embodiment is as follows: In use, the manual / automatic integrated control valve is installed in the pipeline system. Operating the automatic telescopic rod assembly 70 drives the gate assembly 30 to slide upwards within the rectangular sliding groove 4. The gate assembly 30 can block the circular liquid flow channel 2, achieving the purpose of closure. When the automatic telescopic rod assembly 70 drives the gate assembly 30 to slide downwards within the rectangular sliding groove 4, the circular liquid flow channel 2 is in an open state, achieving the purpose of opening the control valve. Using the automatic telescopic rod assembly 70 as a power source to drive the gate assembly 30 to move reduces the labor intensity of workers. When the automatic telescopic rod assembly 70 malfunctions and needs repair, it is disassembled for maintenance. Rotating the circular handle 85 drives the rotating shaft 84 to rotate, which in turn drives the gear 82 to rotate. The gear 82 drives the rack 81 to move linearly. The rack 81, through the sliding rod 9, drives the gate assembly 30 to slide within the rectangular sliding groove 4, thereby achieving the opening and closing of the circular liquid flow channel 2, enhancing operational convenience and improving the usage effect.

[0048] The above description is merely an embodiment of this utility model and does not limit the patent scope of this utility model. Any equivalent structural or procedural transformations made using the content of this utility model specification, or direct or indirect applications in other related technical fields, are similarly included within the patent protection scope of this utility model.

Claims

1. A manual / automatic integrated control valve, characterized in that, include: The valve body (1) and the circular liquid flow channel (2) are provided in the valve body (1). The valve body (1) is also provided with a rectangular sliding groove (4) perpendicular to the circular liquid flow channel (2). The width of the rectangular sliding groove (4) is greater than the diameter of the circular liquid flow channel (2) and they are connected. A gate assembly (30) is slidably connected in the rectangular sliding groove (4). The bottom of the valve body (1) is connected to a sealing cover assembly (50) that blocks the lower opening of the rectangular sliding groove (4), and the top is connected to a circular sealing seat assembly (60) that blocks the upper opening of the rectangular sliding groove (4). A sliding rod (9) is slidably connected inside the circular sealing seat assembly (60). The lower end of the sliding rod (9) is connected to the gate assembly (30). The upper surface of the valve body (1) is connected to a mounting bracket (11). An automatic telescopic rod assembly (70) is connected to the mounting bracket (11). The extended end of the automatic telescopic rod assembly (70) is connected to the upper end of the sliding rod (9). The valve body (1) also includes a manual drive mechanism (80) suitable for driving the sliding rod (9) to move axially. The manual drive mechanism (80) includes a rack (81) and a gear (82) meshing with the rack (81). A T-shaped mounting base (83) is connected to the mounting bracket (11). A rotating shaft (84) is passed through the T-shaped mounting base (83). One end of the rotating shaft (84) passes through the central hole of the gear (82) and is connected by a key. The other end is connected to a circular handle (85).

2. The manual / automatic integrated control valve according to claim 1, characterized in that, The gate assembly (30) includes a gate body (31), which has a circular through hole (32). One side of the gate body (31) has a circular blind hole (33) located below the circular through hole (32), and the other side has a circular blind hole (34) concentric with the circular blind hole (33). Circular sealing plates (35) are respectively provided in the circular blind hole (33) and the circular blind hole (34). A plurality of through holes (36) are arranged in a ring array at the end of the inner cavity of the circular blind hole (33). Guide rods (37) are slidably connected in the through holes (36). The two ends of the guide rods (37) are respectively connected to the corresponding circular sealing plates (35). The length of the guide rods (37) is greater than the distance between the circular blind hole (33) and the circular blind hole (34).

3. The manual / automatic integrated control valve according to claim 2, characterized in that, The circular sealing plate (35) includes a circular sealing plate (351). The end of the circular sealing plate (351) away from the guide rod (37) is provided with an annular groove (352) concentrically. The annular groove (352) is provided with a wear-resistant sealing ring (353). The inner diameter of the wear-resistant sealing ring (353) is larger than the diameter of the circular liquid flow channel (2).

4. The manual / automatic integrated control valve according to claim 1, characterized in that, The automatic telescopic rod assembly (70) includes a hydraulic cylinder (71) and a retaining sleeve connector (72). The hydraulic cylinder (71) is fixed on the mounting bracket (11), and the extension rod of the hydraulic cylinder (71) is connected to the upper end of the sliding rod (9) through the retaining sleeve connector (72).

5. The manual / automatic integrated control valve according to claim 4, characterized in that, The ferrule connector (72) includes a first annular groove (721) on the extension rod of the cylinder (71) and a second annular groove (722) on the outer circle of the upper end of the sliding rod (9). It also includes a fixing plate (723) and U-shaped plates (724) connected to its upper and lower ends respectively. The upper U-shaped plate (724) is fitted in the first annular groove (721), and the lower U-shaped plate (724) is fitted in the second annular groove (722). A limiting plate (725) is detachably connected between the ends of the two U-shaped plates (724) away from the fixing plate (723).

6. The manual / automatic integrated control valve according to claim 1, characterized in that, The sealing cover assembly (50) includes a sealing cover body (51), the sealing cover body (51) is provided with an annular groove two (52), the inner cavity of the annular groove two (52) is provided with a rubber sealing ring one (53), the rubber sealing ring one (53) is tightly connected to the sealing cover body (51), and a number of bolts are arranged in annular array on the sealing cover body (51), the bolts are spirally inserted on the valve body (1).

7. The manual / automatic integrated control valve according to claim 1, characterized in that, The circular sealing seat assembly (60) includes a circular sealing seat body (61). The lower end face of the circular sealing seat body (61) is provided with an annular groove three (62). The inner cavity of the annular groove three (62) is provided with a rubber sealing ring two (63). The rubber sealing ring two (63) is tightly connected to the valve body (1). The inner wall of the circular sealing seat body (61) is provided with an annular groove four (64). The inner cavity of the annular groove four (64) is provided with a wear-resistant sealing ring two (65). The wear-resistant sealing ring two (65) is sleeved on the outer circle of the sliding rod (9) and slidably connected.

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