JPH058145U - Manual valve for hydraulic equipment - Google Patents

Abstract

(57) [Abstract] [Purpose] To prevent the seal member from being damaged or disengaged due to the pressure difference and improve the durability of the seal. A seal member mounting groove 8 is formed by mounting a cap member 7 on the end of the valve body 5, and a convex portion 7a is formed on the outer periphery of the cap member 7 to form an outer periphery of the sealing member mounting groove 8. Formed narrower than the width of the seal member to which the side opening is attached,
Further, in the mounting groove 8, an O-ring 9 which is a seal member having large elastic deformation is mounted on the inner peripheral side, and a Teflon ring 10 which is a seal member having small elastic deformation is mounted on the outer peripheral side.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

  The present invention relates to a manual valve used for various hydraulic devices.

[0002]

[Prior art]

  As shown in FIG. 4, a conventional hydraulic device is installed in a metal valve housing 100 with a cylinder. A plurality of oil passages 101 that connect the water head and the tank are formed. Manual valve 102 that opens and closes the oil passage manually and the hydraulic pressure Relief valves 103 that return the hydraulic oil to the tank when the temperature rises are separately provided. Manu The Al valve 102 is mounted on the valve housing 100 as shown in FIG. A valve body 105 is screwed into the clearance hole 104 so as to be able to move back and forth, and the end portion outer peripheral surface of the valve body 105 is attached. The formed seal member mounting groove 106 is formed, and the O-ring 1 is inserted in the mounting groove 106. I am wearing 07.

[0003]

[Problems to be solved by the device]

  In the conventional manual valve described above, in order to operate this valve As shown in FIG. 5, when the valve body 105 is moved, the O-ring 107 is attached to the mounting hole 10. The left side is sealed by the O-ring 107 when it hits the tapered surface 104a of No. 4 Due to the pressure difference in the right chamber, the O-ring 107 causes the mounting groove 10 to It may come off from 6 or be cut.

[0004]

[Means for Solving the Problems]

  In order to solve the above-mentioned problems, the present invention attaches a cap member to the end of the valve body to seal it. The mounting groove for the member is formed, and the opening on the outer peripheral side of the mounting groove for the sealing member is set to the width of the sealing member. Formed narrower than the size.

[0005]

[Action]

  The mounting groove for the seal member has an opening on the outer peripheral side narrower than the width dimension of the seal member. Therefore, even if a pressure difference occurs when moving the valve element, the seal member It does not come off and durability is improved.

[0006]

【Example】

  Embodiments of the present invention will be described below with reference to the accompanying drawings. Here, FIG. 1 shows the present invention. Fig. 2 is a cross-sectional view of the manual valve according to Fig. 2. FIG. 3 and FIG. 3 are cross-sectional views showing a state in which the pressure in the inflow oil passage of the valve exceeds a predetermined value.

[0007]   The valve housing 1 is provided with an assembly hole 4 for opening the inflow oil passage 2 and the outflow oil passage 3. The valve body 5 for opening and closing the inflow oil passage 2 is provided in the mounting hole 4 via the O-ring 6. The valve element 5 is screwed so that it can move back and forth, and the valve element 5 is provided between the outer peripheral surface of the valve element 5 and the inner peripheral surface of the mounting hole 4. The first oil passage a1 is formed with a gap.

[0008]   The valve element 5 has a valve element front part 5a and a bottomed end that is joined (fitted, pinned, screwed, etc.) to this. It is combined with a tubular valve body rear portion 5b. A cap member is provided at the front end of the valve body front portion 5a. 7 is formed to form a seal member mounting groove 8, and a projection is formed on the outer periphery of the cap member 7. Width of the seal member for forming the portion 7a and mounting the outer peripheral side opening of the seal member mounting groove 8 Formed narrower than the size. Then, in the mounting groove 8, a seal member having a large elastic deformation is formed. The O-ring 9 is a seal member with a small elastic deformation, and is a Teflon-li Ring 10 (or bake ring with cloth, etc.) may be attached to the outer peripheral side. It

[0009]   Further, the valve body front portion 5a and the cap member 8 are opposed to the inflow oil passage 2 at the center portions. An oil passage 12a is bored, and the oil passage 12a is provided between the valve body front portion 5a and the valve body rear portion 5b. The steel ball 13, the spring guide 14, and the spring 15 are arranged in this order. The steel ball 13 is pressed against the opening of the oil passage 12a by the elastic force of the spring 15. I am trying to do it.

[0010]   An oil passage 12b is formed in the valve body rear portion 5b so as to face the outflow oil passage 3, and the oil passage 12a is formed. The second oil passage a2 is formed in communication with the valve body, and the rotation of a driver or the like is provided on the back of the valve body rear portion 5b. A groove 5c for engaging a jig is provided.

[0011]   The operation of the manual valve configured as described above will be described below. First When manually opening the manual valve, the rotary valve is inserted into the groove 5c of the valve body 5 in FIG. The tool is engaged and the valve body 5 is rotated to retract in the A direction. This gives the result shown in Figure 2. In the assembly hole 4, the cap member 7 and the Teflon ring 10 at the tip of the valve body 5 A gap is created between the peripheral surface and the taper portion 4a, and the inflow oil passage 2 and the outflow are formed through this gap. The first oil passage a1 is opened by communicating with the oil passage 3.

[0012]   In this case, when the inflow oil passage 2 side becomes high pressure and the outflow oil passage 3 side becomes low pressure, When the ring 10 faces the taper portion 4a of the mounting hole 4, the Teflon ring 10 flows. Although a pulling force is generated on the oil output passage 3 side, the protrusion 7a of the cap member 7 causes the mounting groove 8 Since the opening of the seal member is narrower than the width of the seal member, the Teflon ring 10 and the O -The ring 9 will not come off from the inside of the mounting groove 8 or will be pulled and cut. , The durability of the seal is improved.

[0013]   Next, the case of acting as a relief valve will be described. When the oil pressure in the oil passage 2 rises due to a temperature rise, etc., the oil passage 1 in the valve body front portion 5a The hydraulic oil pushes the steel ball 13 against the urging force of the spring 15 through 2a. Then, as shown in FIG. 3, the oil passage 12a and the oil passage 12b are in communication with each other, and the inflow oil passage 2 and the outflow oil are discharged. The second oil passage a2 communicating with the passage 3 is opened, and the hydraulic oil in the valve housing 1 is released. The inflow oil passage 2 can be returned to the tank via the outflow oil passage 3.

[0014]

[Effect of device]

  As described above, according to the present invention, the cap member is attached to the end of the valve body. A mounting groove for the seal member is formed, and an opening on the outer peripheral side of the mounting groove for the seal member is formed in the sealing portion. Since it is formed narrower than the width dimension of the material, when a pressure difference occurs when moving the valve body Also, the seal member will not come off from the mounting groove and will not be damaged. Durability is improved.

[Brief description of drawings]

FIG. 1 is a sectional view of a manual valve according to the present invention.

FIG. 2 is a sectional view showing a state in which the valve is manually opened.

FIG. 3 is a cross-sectional view showing a state in which the pressure in the oil passage of the valve exceeds a predetermined value.

FIG. 4 is a cross-sectional view of a valve housing conventionally equipped with a manual valve,

FIG. 5 is a cross-sectional view of the main parts of the valve when it is operating.

[Explanation of symbols]

1 ... Valve housing, 2 ... Inflow oil passage, 3 ... Outflow oil passage,
4 ... Mounting hole, 5 ... Valve body, 7 ... Cap member, 8 ... Seal member mounting groove, 9 ... O-ring, 10 ... Teflon ring.

Claims (2)

[Scope of utility model registration request] 1. An assembling hole for opening an inflow oil passage and an outflow oil passage is formed in a valve housing, and a valve element for opening and closing between the inflow oil passage and the outflow oil passage is moved back and forth in the assembling hole. In a manual valve of a hydraulic device, which is freely screwed and liquid-tightly seals a gap between the outer peripheral surface of the valve body and the inner peripheral surface of the mounting hole, a cap member is provided at an end of the valve body. Is mounted to form a seal member mounting groove, and an outer peripheral side opening of the seal member mounting groove is formed to be narrower than a width dimension of the seal member. 2. The hydraulic pressure according to claim 1, wherein in the seal member mounting groove, a seal member having large elastic deformation is mounted on an inner peripheral side and a seal member having small elastic deformation is mounted on an outer peripheral side. Manual valve for equipment.