Valve element of three-purpose valve

Abstract

The utility model discloses a valve element of a three-purpose valve, and relates to the technical field of three-purpose valves. The three-purpose valve element comprises a valve element body and an oil injection hole formed in the input end of the valve element body, a positioning ring is fixedly connected to the interior of the oil injection hole, a sealing ring is fixedly installed on the surface of the positioning ring, and an installation cylinder is installed in the oil injection hole in a threaded mode. Through the arrangement of the sealing groove, the sealing block and the like, when the sealing performance of the sealing ball and the sealing gasket becomes poor, the air pressure in the sealing groove can be adjusted only by rotating the adjusting bolt without replacing the sealing piece, and the pressure of the sealing ball and the sealing gasket can be adjusted; the sealing ball and the sealing gasket are arranged, so that good sealing performance is achieved between the sealing ball and the sealing gasket, the mounting cylinder and the valve element body can be conveniently assembled through the hexagonal groove, the mounting cylinder can be limited through the positioning ring and the sealing ring, and meanwhile the sealing performance between the mounting cylinder and the valve element body is enhanced.

Description

Technical Field

[0001] The utility model relates to the technical field of three-purpose valves, in particular to a three-purpose valve core. Background Art

[0002] The three-way valve is the core component of the single hydraulic support, which directly affects the life and use of the single hydraulic support. The three-way valve is the key part of the single hydraulic support. It plays the role of filling and raising the column, overload overflow, and load unloading and lowering the column. The structure and working principle broadcast editor The three-way valve is composed of a one-way valve, an unloading valve and a safety valve. When working, the high-pressure liquid opens the one-way valve of the injection valve body through the injection gun, and the high-pressure liquid enters the lower cavity of the support, and the active column rises.

[0003] After searching, the publication number is CN110529158A, and the specific name is a three-way valve, which is provided with a valve cylinder, the valve cylinder is divided into a left valve cylinder and a right valve cylinder, the right valve cylinder is inserted into the left valve cylinder, an oil injection valve body is provided in the left valve cylinder, a check valve seat is provided on the inner side of the oil injection valve body, a limiting sleeve is provided between the check valve seat and the oil injection valve body, and a compression screw sleeve is provided on one side of the limiting sleeve;

[0004] The steel ball inside the three-way valve is pressed against the surface of the seal by the elastic force of the spring to realize the one-way valve function. However, when the steel ball moves, the spring is always in a state of opening and closing. As the elastic force of the spring decreases, the tightness between the steel ball and the seal will weaken, resulting in a decrease in the sealing performance of the valve. This may cause media leakage or the valve cannot be completely closed, thus affecting the normal operation of the equipment or pipeline system. Utility Model Content

[0005] In view of the shortcomings of the prior art, the utility model provides a three-way valve core, which solves the problem that the steel ball inside the existing three-way valve is pressed against the surface of the seal by the elastic force of the spring. As the elastic force of the spring decreases, the tightness between the steel ball and the seal will weaken, resulting in a decrease in the sealing performance of the valve. This may cause the medium to leak or the valve cannot be completely closed, thereby affecting the normal operation of the equipment or pipeline system.

[0006] To achieve the above objectives, the utility model is implemented through the following technical solutions: a three-purpose valve core, comprising a valve core body and an oil filling hole arranged at the input end of the valve core body, a positioning ring is fixedly connected to the inside of the oil filling hole, a sealing ring is fixedly installed on the surface of the positioning ring, a mounting cylinder is installed on the internal thread of the oil filling hole, oil inlet holes are equidistantly provided on the top of the mounting cylinder, a hexagonal groove is provided at the center of the top of the mounting cylinder, an oil passing groove connected to the inside of the oil inlet hole is provided inside the mounting cylinder, a sealing gasket is fixedly installed at the center of the inside of the mounting cylinder, and sealing A groove, the internal sealing sliding connection of the sealing groove is provided with a sealing block, the bottom of the sealing block is fixedly connected with a connecting rod, the end of the connecting rod away from the sealing block is fixedly connected with a fixing plate, the surface of the fixing plate is provided with oil holes at equal intervals, the center of the surface of the fixing plate close to the sealing gasket is fixedly connected with a sealing ball, the interior of the mounting cylinder is provided with an adjusting groove connected with the interior of the sealing groove, the internal sealing sliding connection of the adjusting groove is provided with an adjusting plate, the internal thread of the mounting cylinder is connected with an adjusting bolt, the end of the adjusting bolt close to the adjusting plate is fixedly connected with a turntable, and the outer surface of the turntable is rotatably connected to the interior of the adjusting plate.

[0007] Preferably, the interior of the oil inlet hole is connected to the interior of the sealing gasket through an oil groove, and the surface of the sealing ball is sealingly attached to the surface of the sealing gasket.

[0008] Preferably, the sealing ball is hemispherical, one end of the connecting rod away from the fixing plate extends to the inside of the sealing groove, and sealing rings are installed on the outer surfaces of the sealing block and the adjusting plate.

[0009] Preferably, the interior of the sealing groove is in a negative pressure state, and an oil outlet is provided at the bottom of the mounting tube.

[0010] Preferably, the outer surface of the mounting tube and the inner wall of the oil filling hole are both provided with matching threads, and the mounting tube is sealingly connected to the positioning ring via a sealing ring.

[0011] Preferably, one end of the sealing groove away from the adjustment plate is in a non-sealed state, and one end of the adjustment groove away from the sealing groove is in a non-sealed state.

[0012] Beneficial Effects

[0013] The utility model provides a three-purpose valve core. Compared with the prior art, it has the following beneficial effects:

[0014] 1. The valve core of the three-purpose valve is provided with a sealing groove and a sealing block. When the sealing performance of the sealing ball and the sealing gasket deteriorates, there is no need to replace the sealing parts. The air pressure inside the sealing groove can be adjusted by turning the adjusting bolt, and the pressure of the sealing ball and the sealing gasket can be adjusted to ensure better sealing performance between the sealing ball and the sealing gasket.

[0015] 2. The three-purpose valve core can facilitate the assembly of the installation cylinder and the valve core body by providing a hexagonal groove. The installation cylinder can be limited by providing a positioning ring and a sealing ring, and the sealing between the installation cylinder and the valve core body is also strengthened. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a schematic diagram of the structure of the utility model;

[0017] Figure 2 This is a schematic diagram of the connection between the valve core body and the mounting cylinder in the utility model;

[0018] Figure 3 It is a structural schematic diagram of the installation cylinder in the utility model;

[0019] Figure 4 It is a cross-sectional view of the installation cylinder in the utility model;

[0020] Figure 5 It is a schematic diagram of the connection between the sealing block and the fixing plate in the utility model.

[0021] In the figure: 1. valve core body; 2. oil filling hole; 3. positioning ring; 4. sealing ring; 5. mounting cylinder; 6. oil inlet hole; 7. hexagonal groove; 8. oil passage groove; 9. sealing gasket; 10. sealing groove; 11. sealing block; 12. connecting rod; 13. fixing plate; 14. oil passage hole; 15. sealing ball; 16. adjusting groove; 17. adjusting plate; 18. adjusting bolt; 19. oil outlet. DETAILED DESCRIPTION

[0022] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0023] See also Figure 1-5The utility model provides a technical solution: a three-purpose valve core, including a valve core body 1 and an oil filling hole 2 arranged at the input end of the valve core body 1, a positioning ring 3 is fixedly connected to the inside of the oil filling hole 2, a sealing ring 4 is fixedly installed on the surface of the positioning ring 3, a mounting cylinder 5 is installed on the internal thread of the oil filling hole 2, the outer surface of the mounting cylinder 5 and the inner wall of the oil filling hole 2 are both provided with matching threads, the mounting cylinder 5 is sealed and connected to the positioning ring 3 through the sealing ring 4, oil inlet holes 6 are equidistantly opened on the top of the mounting cylinder 5, a hexagonal groove 7 is opened at the center of the top of the mounting cylinder 5, an oil groove 8 connected to the inside of the oil inlet hole 6 is opened inside the mounting cylinder 5, a sealing gasket 9 is fixedly installed at the center of the inside of the mounting cylinder 5, and the inside of the oil inlet hole 6 is connected to the oil inlet hole 6 through the oil groove 8 The inside of the sealing gasket 9 is connected, and sealing grooves 10 are equidistantly provided inside the mounting tube 5. The inside of the sealing groove 10 is in a negative pressure state. The inside of the sealing groove 10 is sealingly and slidingly connected with a sealing block 11. The bottom of the sealing block 11 is fixedly connected with a connecting rod 12. The end of the connecting rod 12 away from the sealing block 11 is fixedly connected with a fixing plate 13. The end of the connecting rod 12 away from the fixing plate 13 extends to the inside of the sealing groove 10. The surface of the fixing plate 13 is equidistantly provided with oil holes 14. The fixing plate 13 is fixedly connected with a sealing ball 15 at the center of the surface of the sealing gasket 9. The surface of the sealing ball 15 is sealingly fitted to the surface of the sealing gasket 9. The sealing ball 15 is hemispherical. The negative pressure inside the sealing groove 10 can make the sealing ball 15 slide upward under normal conditions.

[0024] An adjusting groove 16 connected to the inside of the sealing groove 10 is provided inside the mounting tube 5, and the end of the adjusting groove 16 away from the sealing groove 10 is in a non-sealed state. An adjusting plate 17 is connected to the inner sealing sliding connection of the adjusting groove 16, and the end of the sealing groove 10 away from the adjusting plate 17 is in a non-sealed state. The outer surfaces of the sealing block 11 and the adjusting plate 17 are both installed with sealing rings. An adjusting bolt 18 is connected to the inner thread of the mounting tube 5, and a turntable is fixedly connected to the end of the adjusting bolt 18 close to the adjusting plate 17, and the outer surface of the turntable is rotatably connected to the inside of the adjusting plate 17. An oil outlet 19 is provided at the bottom of the mounting tube 5. By providing the sealing groove 10 and the sealing block 11, etc., when the sealing performance of the sealing ball 15 and the sealing gasket 9 deteriorates, there is no need to replace the seal. Only by rotating the adjusting bolt 18, the air pressure inside the sealing groove 10 can be adjusted, and the pressure of the sealing ball 15 and the sealing gasket 9 can be adjusted, so that the sealing ball 15 and the sealing gasket 9 have better sealing performance.

[0025] When the valve core body 1 is working, the high-pressure oil enters the oil groove 8 through the oil inlet hole 6, and then passes through the sealing gasket 9 to push the sealing ball 15 to slide. The sealing ball 15 drives the connecting rod 12 and the sealing block 11 to slide through the fixing plate 13. The high-pressure oil will pass through the sealing gasket 9 and enter the valve core body 1 from the oil outlet 19. When the oil filling is stopped, due to the negative pressure inside the sealing groove 10, the sealing block 11 drives the fixing plate 13 to slide upward through the connecting rod 12. At this time, the surface of the sealing ball 15 is sealed against the surface of the sealing gasket 9. When the sealing performance of the sealing ball 15 and the sealing gasket 9 deteriorates, there is no need to replace the seal. Only by rotating the adjusting bolt 18, the air pressure inside the sealing groove 10 can be adjusted, and the pressure of the sealing ball 15 and the sealing gasket 9 can be adjusted, so that the sealing ball 15 and the sealing gasket 9 have a better sealing performance.

[0026] Meanwhile, the contents not described in detail in this specification belong to the prior art known to those skilled in the art.

Claims

1. A three-purpose valve core, comprising a core body (1) and an oil injection hole (2) arranged at an input end of the core body (1), characterized in that: The inside of the oil filling hole (2) is fixedly connected with a positioning ring (3), and a sealing ring (4) is fixedly installed on the surface of the positioning ring (3). The internal thread of the oil filling hole (2) is installed with a mounting tube (5), and the top of the mounting tube (5) is provided with oil inlet holes (6) at equal intervals. The top center of the mounting tube (5) is provided with a hexagonal groove (7). The inside of the mounting tube (5) is provided with an oil passage groove (8) connected with the inside of the oil inlet hole (6). A sealing gasket (9) is fixedly installed at the center of the inside of the mounting tube (5). The inside of the mounting tube (5) is provided with sealing grooves (10) at equal intervals. The inside of the sealing groove (10) is sealingly and slidably connected with a sealing block (11), and the bottom of the sealing block (11) is fixedly connected to the bottom of the sealing block (11). A connecting rod (12) is provided, and one end of the connecting rod (12) away from the sealing block (11) is fixedly connected to a fixing plate (13), and the surface of the fixing plate (13) is provided with oil holes (14) at equal intervals. A sealing ball (15) is fixedly connected to the center of the surface of the fixing plate (13) close to the sealing gasket (9). An adjusting groove (16) connected to the inside of the sealing groove (10) is provided inside the mounting tube (5), and an adjusting plate (17) is sealingly slidably connected to the inside of the adjusting groove (16). An adjusting bolt (18) is threadedly connected to the inside of the mounting tube (5), and a rotating disk is fixedly connected to one end of the adjusting bolt (18) close to the adjusting plate (17), and the outer surface of the rotating disk is rotatably connected to the inside of the adjusting plate (17).

2. A three-purpose valve core according to claim 1, characterized in that: The interior of the oil inlet hole (6) is connected to the interior of the sealing gasket (9) through the oil groove (8), and the surface of the sealing ball (15) is sealingly attached to the surface of the sealing gasket (9).

3. The three-way valve core according to claim 1, characterized in that: The sealing ball (15) is hemispherical, one end of the connecting rod (12) away from the fixing plate (13) extends into the interior of the sealing groove (10), and sealing rings are installed on the outer surfaces of the sealing block (11) and the adjusting plate (17).

4. The three-purpose valve core according to claim 1, characterized in that: The interior of the sealing groove (10) is in a negative pressure state, and an oil outlet (19) is provided at the bottom of the mounting tube (5).

5. The three-purpose valve core according to claim 1, characterized in that: The outer surface of the installation tube (5) and the inner wall of the oil filling hole (2) are both provided with matching threads, and the installation tube (5) is sealedly connected to the positioning ring (3) via a sealing ring (4).

6. The three-purpose valve core according to claim 1, characterized in that: The end of the sealing groove (10) away from the adjustment plate (17) is in a non-sealed state, and the end of the adjustment groove (16) away from the sealing groove (10) is in a non-sealed state.

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