JP3851543B2 - Pressure regulating valve - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a pressure regulating valve that is attached to a discharge portion or the like of a pump and is used for regulating a discharge pressure of the pump.
[0002]
[Prior art]
FIG. 6 is a cross-sectional view showing a conventional dial type pressure regulating valve.
In this pressure regulating valve, when the grip 62 threadedly engaged with the spring cylinder 61 is rotated around the axis of the spring cylinder 61 and the grip 62 is moved downward with respect to the spring cylinder 61, the bolt fixed to the grip 62 The compression coil spring 65 is compressed through the sprung 64 by 63, and the spring load generated by the compression of the compression coil spring 65 acts on the valve 68 through the unsprung 66 and the valve rod 67, and presses the valve 68 against the valve seat 69. Then, the liquid discharged from the pump pushes up the valve 68 and passes through the gap between the valve 68 and the valve seat 69, whereby pressure is generated in the pump.
[0003]
[Problems to be solved by the invention]
However, in this conventional dial type pressure regulating valve, it is necessary to rotate the grip 62 once or twice in order to increase the pressure from the open state to the maximum pressure state. In this operation, the predetermined rotation cannot be performed, and the operation needs to be performed in several times. In addition, since the grip 62 is rotated around the axis of the spring cylinder 61, the operator forcibly twists and operates the wrist, so that it is difficult to apply force and the wrist becomes tired.
[0004]
The present invention has been made in view of the above circumstances, and an object of the present invention is to provide a pressure regulating valve that can perform pressure regulation easily and quickly and can be operated easily.
[0005]
[Means for Solving the Problems]
In order to achieve the above object, the pressure regulating valve according to claim 1 is configured such that the valve (20) is controlled by a spring (22) that is compressible in the axial direction of the spring cylinder (14) in the spring cylinder (14). In the pressure regulating valve that presses against the seat (18), a grip (30) is provided on the spring cylinder (14) so as to be rotatable in a plane direction including the axis of the spring cylinder (14). A plurality of recesses (36) are provided on the arc-shaped inner surface (35) at predetermined intervals so that the distance from the rotation center of the grip (30) becomes gradually shorter. A pin (24) is interposed between the inner surface (35) and the spring (22) so as to be movable in the axial direction of the spring cylinder (14).
[0006]
In the pressure regulating valve according to claim 1, when the grip is rotated in a direction in which the distance from the rotation center of the grip to the recess gradually decreases and the tip of the pin is positioned in each recess, the pin is spring-loaded. The amount of movement toward the spring in the cylinder gradually increases, and the amount of spring compressed by the pin increases. For this reason, the load of the spring generated by the compression of the spring becomes large, the valve is pressed against the valve seat with a large load, and the pump is gradually in a large pressurized state.
Conversely, when the grip is rotated in the direction in which the distance from the center of rotation of the grip to the recess gradually increases and the tip of the pin is positioned in each recess, the pump is gradually depressurized.
[0007]
As described above, in this pressure regulating valve, the pressure can be increased or decreased in steps only by rotating the grip, so that the pressure can be adjusted easily and quickly. In addition, since the grip is rotated in the direction of the surface including the axis of the spring cylinder, it is not necessary to operate the wrist while it is forcibly twisted. Easy to operate.
[0008]
According to a second aspect of the present invention, in the pressure regulating valve according to the first aspect of the present invention, the support member (27) is provided in the spring cylinder (14) so as to be movable in the axial direction of the spring cylinder (14). The support member (27) is provided with a support pin (28), and the grip (30) is rotatably provided on the support pin (28).
[0009]
In the pressure regulating valve according to claim 2, the position of the support member is moved in the axial direction of the spring cylinder, and thereby the axial direction of the spring cylinder with respect to the gripping spring cylinder connected to the support member via the support pin is increased. You can change the distance. Therefore, when the upper end of the pin is positioned in each recess, the amount of movement of the pin toward the spring cylinder by each recess can be changed, so that the pressure at the position of each recess can be finely adjusted.
[0010]
According to a third aspect of the present invention, in the pressure regulating valve according to the first aspect, the support member (27) is provided on the spring cylinder (14) so that the fixed position is movable around the axis of the spring cylinder (14). The support member (27) is provided with a support pin (28), and the grip (30) is rotatably provided on the support pin (28).
[0011]
In the pressure regulating valve according to claim 3, since the support member and the grip connected thereto can be moved around the axis of the spring cylinder to change the rotation direction of the grip, the pressure regulating valve is attached to the pump. Depending on the position and work situation, the grip can be rotated in a desired direction for easy operation.
[0012]
According to a fourth aspect of the present invention, in the pressure regulating valve according to the second or third aspect, the support member (27) is screwed into a male screw (14c) formed on an outer peripheral surface of the spring cylinder (14). It is characterized by being clamped between two joined nuts (25, 26).
[0013]
In the pressure regulating valve according to claim 4, by moving the position of the two nuts screwed to the male screw of the spring cylinder, and sandwiching the support member between these nuts at the position after this movement The position of the support member can be easily moved in the axial direction of the spring cylinder.
Further, only one of the two nuts screwed to the male screw of the spring cylinder is moved (loosened), and the tightening of the support member by these nuts is released, so that the support member is arranged around the axis of the spring cylinder. The grip connected to this can be easily moved.
[0014]
In addition, the code | symbol in the bracket | parenthesis in the above expresses the corresponding element in drawing for convenience, Therefore, this invention is not limited to description on drawing. The same applies to the description in the column “Claims”.
[0015]
DETAILED DESCRIPTION OF THE INVENTION
Hereinafter, embodiments of the present invention will be described with reference to the drawings.
1-3 is a figure which shows the pressure regulation valve which concerns on embodiment of this invention, Comprising: FIG. 1 is a front view, FIG. 2 is sectional drawing in alignment with the AA of FIG. 1, FIG. FIG.
[0016]
This pressure regulating valve includes a flange 11. A male screw 12 is formed at the lower portion of the flange 11, and the male screw 12 is attached to a discharge portion of a pump (not shown) by being screwed. Further, a through hole 13 communicating with the discharge port of the pump is formed at the center of the flange 11. A spring cylinder 14 is fastened and joined to the upper portion of the flange 11 by a bolt 15. In the lower part of the spring cylinder 14, an inflow port 16 communicating with the through hole 13 of the flange 11 and a surplus liquid port 17 are provided. A valve seat 18 is disposed at the inlet 16, and an O-ring 19 is provided on the outer periphery of the valve seat 18, and between the valve seat 18 and the spring cylinder 14 and between the spring cylinder 14 and the flange 11. Is sealed.
[0017]
A spherical valve 20 is seated on the valve seat 18, and a lower end of an unsprung portion 21 is in contact with an upper portion of the valve 20. The upper end portion of the unsprung portion 21 is fitted into the tube portion 14a of the spring tube 14, and the outer periphery of the upper end portion of the unsprung portion 21 is thereby guided by the inner surface of the tube portion 14a so that the unsprung portion 21 does not rattle. It has become. The upper end of the unsprung portion 21 receives the lower end of the compression coil spring (spring) 22, and the upper end of the compression coil spring 22 is in contact with the lower end of the sprung top 23. The unsprung 21, the compression coil spring 22, and the sprung 23 are accommodated in the cylinder portion 14 a of the spring cylinder 14 so as to be vertically movable.
[0018]
A through hole 14b is formed in the upper wall of the cylindrical portion 14a of the spring cylinder 14. A pin 24 is inserted into the through hole 14 b so as to be movable up and down, and its lower end is in contact with the upper end of the sprung 23.
In addition, a male screw 14c is formed at an intermediate portion of the outer peripheral surface of the cylindrical portion 14a of the spring cylinder 14, and two nuts 25 and 26 are screwed to the male screw 14c. Between these nuts 25 and 26, a stay (support member) 27 is inserted to the outside of the male screw 14c, and is fastened by the nuts 25 and 26 to be fixed to the outside of the cylindrical portion 14a. The lower nut 26 is fitted in-slot with the stay 27 so that the nut 26 and the stay 27 are located concentrically. The stay 27 includes L-shaped arm portions 27a and 27a at the position of the point object around the axis of the cylindrical portion 14a. Support pins 28, 28 with hooks are provided in the through holes 27c, 27c of the support portions 27b, 27b extending in parallel with the axis of the cylinder portion 14a of the arm portions 27a, 27a, respectively. Inserted in the direction.
[0019]
A grip 30 is attached to these support pins 28 and 28. The grip 30 includes a strip-shaped top plate portion 31 formed in a substantially arc shape, and side plate portions 32 and 32 hanging from both ends of the top plate portion 31.
[0020]
Each of the side plate portions 32, 32 is formed in a substantially quarter-disc shape, and support pins 28, 28 are provided in the through holes 32a, 32a formed at the end portion on the center side of the circle. The both side plate portions 32, 32, that is, the grips 30, are inserted through the support pins 28, 28. Retaining rings 33, 33 are attached to the outer ends of the supporting pins 28, 28, and the retaining pins 33, 33 prevent the supporting pins 28, 28 from coming off.
[0021]
The upper end of the pin 24 is in contact with the arc-shaped inner surface 35 of the top plate portion 31. A plurality of recesses 36 are formed in the inner surface 35 at a predetermined interval. The distance from each of the recesses 36 to the axis of the support pin 28 that is the center of rotation of the grip 30 is from one end to the other end of the top plate 31 (in FIG. 3, from the recess 36 positioned on the upper side in the clockwise direction). (Toward the concave portion 36 located on the right side) is set to be gradually shortened. In FIG. 3, the distance from the uppermost concave portion 36 to the axis of the support pin 28 (the center of rotation of the grip 30) is such that when the upper end of the pin 24 is located in the concave portion 36, the lower end of the pin 24 is a spring. The distance is set so as not to press the upper 23 (therefore, the compression coil spring 22). A handle portion 38 extending in an arc shape along the outer surface 37 is formed on the arc-shaped outer surface 37 of the top plate portion 31.
[0022]
In this pressure regulating valve, the state shown in FIG. 4 is a pressure release state. In this state, the distance from the concave portion 36 where the upper end of the pin 24 is located to the axis of the support pin 28 (the center of rotation of the grip 30) is the longest, and the pin 24 does not compress the compression coil spring 22. In other words, the pressure is not applied.
[0023]
In order to change from the pressure release state to the pressure state, as shown by an arrow in the figure, the grip 30 is rotated counterclockwise about the support pin 28 so that the upper end of the pin 24 is placed in the desired recess 36. Position. In this way, the distance from the recess 36 where the upper end of the pin 24 abuts to the axis of the support pin 28 is shortened, and the pin 24 is pushed into the spring cylinder 14 by a predetermined amount in accordance with this shortening. The compression coil spring 22 is compressed through the sprung 23, and the load of the spring generated by the compression of the compression coil spring 22 acts on the unsprung 21 to push down the unsprung 21 and press the valve 20 against the valve seat 18. Then, the liquid discharged from the pump pushes up the valve 20 and passes through the gap between the valve 20 and the valve seat 18 to generate pressure in the pump.
In this figure, as the grip 30 is rotated counterclockwise, the distance from the recess 36 where the upper end of the pin 24 contacts to the axis of the support pin 28 is shortened, so that the amount that the pin 24 is pushed into the spring cylinder 14. Therefore, the pressure generated in the pump becomes progressively higher.
[0024]
FIG. 5 is a diagram showing a maximum pressurization state of the pressure regulating valve. In order to reduce the pressure from this state, as shown by the arrow in FIG. And if it rotates to the state of FIG. 4, it can be in a pressure release state.
[0025]
In this pressure regulating valve, by simply rotating the grip 30 about 90 degrees around the support pin 28, from the pressure release state to the maximum pressurization state or from the maximum pressurization state to the pressure release state step by step. Since the pressure adjusting operation can be performed, the pressure can be adjusted easily and quickly. Moreover, since the grip 30 is rotated in the plane direction including the axis of the cylindrical portion 14a of the spring cylinder 14 (in the vertical direction in FIGS. 4 and 5), it is not necessary to operate it with the wrist forcibly twisted. Therefore, force is easily applied, so that the burden on the wrist is small and the operation is easy.
[0026]
Further, in this pressure regulating valve, the positions of the nuts 25 and 26 screwed with the male screw 14c of the cylindrical portion 14a of the spring cylinder 14 are moved, and at the position after this movement, the nuts 25 and 26 are moved. By sandwiching the stay 27 therebetween, the position of the stay 27 is moved in the axial direction of the cylindrical portion 14a, and thereby the cylinder with respect to the cylindrical portion 14a of the grip 30 connected to the stay 27 via the support pins 28, 28. The distance in the axial direction of the portion 14a can be changed. As a result, when the upper end of the pin 24 is located in each recess 36, the amount by which the pin 24 is pushed into the spring cylinder 14 by each recess 36 can be changed, so that the pressure at the position of each recess 36 can be changed. Fine adjustments can be made.
[0027]
Furthermore, only one of the nuts 25 and 26 screwed into the male screw 14c of the cylinder portion 14a of the spring cylinder 14 is moved (loosened), and the tightening of the stay 27 by these nuts 25 and 26 is released. Thus, the stay 27 and the grip 30 connected thereto are rotated around the axis of the cylindrical portion 14a, and the stay 27 is tightened by the nuts 25 and 26 at a desired position to fix the grip 30 to the cylindrical portion 14a. it can. As described above, since the rotation direction of the grip 30 can be changed, the rotation direction of the grip 30 is set to a desired direction according to the attachment position of the pressure regulating valve to the pump and the work situation, and an easy operation is performed. be able to.
[0028]
In the present embodiment, the pin 24 and the spring top 23 are formed separately, and the pin 24 presses the compression coil spring 22 through the spring top 23. The upper 23 may be formed integrally.
[0029]
【The invention's effect】
As described above, according to the pressure regulating valve of the present invention, the pressure can be regulated easily and quickly and can be operated easily.
[Brief description of the drawings]
FIG. 1 is a front view showing a pressure regulating valve according to an embodiment of the present invention.
FIG. 2 is a cross-sectional view taken along line AA in FIG.
3 is a cross-sectional view of a grip in FIG. 1. FIG.
4 is a cross-sectional view of the pressure regulating valve of FIG. 1 in a pressure release state.
5 is a cross-sectional view of the pressure regulating valve of FIG. 1 in a maximum pressure state.
FIG. 6 is a cross-sectional view showing a conventional dial type pressure regulating valve.
[Explanation of symbols]
14 Spring cylinder 14c Male thread 18 Valve seat 20 Valve 22 Compression coil spring (spring)
24 Pin 25, 26 Nut 27 Stay (support member)
28 Support pin 30 Grip 35 Inner surface 36 Recess

Claims (4)

In the pressure regulating valve for pressing the valve (20) against the valve seat (18) by the spring (22) compressible in the axial direction of the spring cylinder (14) in the spring cylinder (14),
A grip (30) is provided on the spring cylinder (14) so as to be rotatable in a plane direction including an axis of the spring cylinder (14),
A plurality of recesses (36) are provided on the arc-shaped inner surface (35) of the grip (30) at predetermined intervals so that the distance from the rotation center of the grip (30) becomes gradually shorter.
A pin (24) is interposed between the inner surface (35) of the grip (30) and the spring (22) so as to be movable in the axial direction of the spring cylinder (14). Pressure valve. A support member (27) is provided on the spring cylinder (14) so as to be movable in the axial direction of the spring cylinder (14), and a support pin (28) is provided on the support member (27). 2. The pressure regulating valve according to claim 1, wherein the grip (30) is rotatably provided on the support pin (28). A support member (27) is provided on the spring cylinder (14) so as to be movable around the axis of the spring cylinder (14), and a support pin (28) is provided on the support member (27). 2. The pressure regulating valve according to claim 1, wherein the grip (30) is rotatably provided on the support pin (28). The support member (27) is sandwiched between two nuts (25, 26) screwed into a male screw (14c) formed on the outer peripheral surface of the spring cylinder (14). The pressure regulating valve according to claim 2 or claim 3.

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