Stop valve capable of preventing clamping stagnation

Abstract

An anti-clamping stop valve comprises a valve body, a sheath, a push rod, a piston rod and a reset spring, a piston hole is formed in the valve body, one side of the lower end of the piston hole is communicated with a first connector, the other side of the upper end of the piston hole is communicated with a second connector, the piston rod is arranged in the piston hole, and the reset spring is arranged between the piston rod and the bottom of the piston hole. The push rod cavity is communicated with the piston hole, a sheath is arranged in the push rod cavity, and a push rod is arranged in the sheath. The device has the advantages that the clamping stagnation problem is solved; the air outlet holes are equally divided, so that the air closing stroke is controllable; the service life is long; the cost is low and the processing time is short.

Description

Technical Field

[0001] The present invention relates to a non-sticking globe valve. Background Art

[0002] The globe valve and the five-port two-position valve are combined for gearbox shifting. The air vent function of the globe valve provides the air source for the normal operation of the five-port two-position valve. If the function of the globe valve fails, the five-port two-position valve will surely not work.

[0003] For the existing globe valve, sticking faults occur after the push rod and the old sheath are worn. The sealing ring at the sleeve matches and seals with the inclined piston rod. During use, the sealing ring is easily extruded by the inclined surface and causes sticking. Summary of the Invention

[0004] The purpose of the present invention is to solve the defects existing in the prior art, and to propose a non-sticking globe valve.

[0005] To achieve the above purpose, the present invention adopts the following technical solution: a non-sticking globe valve, including a valve body, a sheath, a push rod, a piston rod and a return spring. A piston hole is provided in the valve body. One side at the lower end of the piston hole communicates with a first interface, and the other side at the upper end of the piston hole communicates with a second interface. A piston rod is provided in the piston hole. A return spring is provided between the piston rod and the bottom of the piston hole. A push rod cavity is provided at the upper end of the piston hole. The push rod cavity communicates with the piston hole. A sheath is provided in the push rod cavity, and a push rod is provided in the sheath.

[0006] Further, a sleeve is sleeved at the connection where the other side at the upper end of the piston hole communicates with the second interface.

[0007] Further, the sheath is an oil-free self-lubricating bearing.

[0008] Further, the lower end of the push rod is arranged in the piston hole, and the lower end of the push rod is larger than the push rod cavity.

[0009] Further, the upper end of the piston rod abuts against the lower end of the push rod. An indentation is provided on the lower end surface of the piston rod, and air outlet holes are provided on the inner wall of the indentation.

[0010] Further, the piston rod is a cylindrical piston rod.

[0011] Further, the sleeve is an aluminum sleeve.

[0012] The beneficial effects of the present invention are: solving the sticking problem; equally dividing the air outlet holes, and the air closing stroke is controllable; long service life; low cost and short processing time. Description of the Drawings

[0013] Figure 1 It is the structure diagram of this patent.

[0014] Figure 2 It is the structure diagram before modification. Detailed Description

[0015] The following will combine the accompanying Figure 1-2 drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments.

[0016] Embodiment 1 Refer to Figure 1-2 , a non-sticking globe valve, including a valve body 1, a sheath 2, a push rod 3, a piston rod 4 and a return spring 5. A piston hole 6 is provided in the valve body. One side at the lower end of the piston hole communicates with a first interface 7, and the other side at the upper end of the piston hole communicates with a second interface 8. A piston rod 4 is provided in the piston hole, and a return spring 5 is provided between the piston rod and the bottom of the piston hole. A push rod cavity 9 is provided at the upper end of the piston hole. The push rod cavity 9 communicates with the piston hole 6, and a sheath 2 is provided in the push rod cavity 9, and a push rod 3 is provided in the sheath 2.

[0017] For a non-sticking globe valve, a sleeve 10 is sleeved at the connection between the other side at the upper end of the piston hole and the second interface.

[0018] For a non-sticking globe valve, the sheath is an oil-free self-lubricating bearing to solve the problem of sticking.

[0019] For a non-sticking globe valve, the lower end of the push rod is arranged in the piston hole, and the lower end of the push rod is larger than the push rod cavity.

[0020] For a non-sticking globe valve, the upper end of the piston rod abuts against the lower end of the push rod. An indentation 11 is provided on the lower end surface of the piston rod, and air outlet holes 12 are provided on the inner wall of the indentation. The equally divided air outlet holes enable the airtight stroke to be controllable.

[0021] For a non-sticking globe valve, the piston rod is a cylindrical piston rod, which has no scraping difference with the sealing ring and will not carry away the sealing ring, thus solving the problem of sticking.

[0022] For a non-sticking globe valve, the sleeve is an aluminum sleeve, which has a long service life and low cost.

[0023] For a non-sticking globe valve, the existing shallowness of the piston hole wall can reduce the processing time.

[0024] For a non-sticking globe valve, after the push rod is pressed down, the piston rod is pressed down, and the air outlet holes leave the second interface 8.

[0025] After the push rod is reset by the return spring, the piston rod rises, and the air outlet holes enter the second interface 8. Through the air outlet holes and the indentation, the first interface and the second interface are communicated.

[0026] The above are only the preferred specific embodiments of the present invention, but the protection scope of the present invention is not limited thereto. Any person skilled in the art within the technical scope disclosed by the present invention, according to the technical solution and inventive concept of the present invention, making equivalent substitutions or changes should be covered within the protection scope of the present invention.

Claims

1. A non-sticking globe valve, comprising a valve body, a sheath, a push rod, a piston rod and a return spring, characterized in that: The valve body is provided with a piston hole. One side at the lower end of the piston hole communicates with the first interface, and the other side at the upper end of the piston hole communicates with the second interface. A piston rod is arranged in the piston hole, and a return spring is arranged between the piston rod and the bottom of the piston hole. A push rod cavity is arranged at the upper end of the piston hole, and the push rod cavity communicates with the piston hole. A sheath is arranged in the push rod cavity, and a push rod is arranged in the sheath.

2. The stop valve with anti-jamming according to claim 1, characterized in that: A sleeve is sleeved at the connection where the other side at the upper end of the piston hole communicates with the second interface.

3. The stop valve with anti-jamming according to claim 2, characterized in that: The sheath is an oil-free self-lubricating bearing.

4. The stop valve for preventing jamming according to claim 3, wherein: The lower end of the push rod is arranged in the piston hole, and the lower end of the push rod is larger than the push rod cavity.

5. The stop valve for preventing jamming according to claim 4, wherein: The upper end of the piston rod abuts against the lower end of the push rod. A concave is arranged on the lower end surface of the piston rod, and air outlet holes are arranged on the inner wall of the concave.

6. The stop valve with anti-sticking property according to claim 5, characterized in that: The piston rod is a cylindrical piston rod.

7. The stop valve for preventing jamming according to claim 2, wherein: The sleeve is an aluminum sleeve.

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