JPS6136849Y2 - - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to a cartridge type relief valve.
Conventionally, for example, as shown in the first diagram, there is a cartridge-type relief valve c that is detachably attached to a block b having a pressure fluid passage a formed therein. It has the advantage of being easy to replace. The valve c is formed through a sliding hole e that is open to the front in an integral cylindrical main body d, and has a sliding valve body g that is retractable in front of the inside thereof against a spring f at the back. and a poppet valve i that opens by the pressure of the opening acting through the pilot passage h, and forms a relief hole j that opens when the sliding valve body g retreats due to the opening of the poppet valve i. In this case, the front sliding valve body g
and the rear poppet valve i, there is a spring seat k and a valve seat 1.
The number of parts is large, and the number of processing steps is also increased, making the process relatively expensive.

The purpose of the present invention is to solve these inconveniences, and a sliding hole 3 with an opening 2 in the front is formed in a cylindrical main body 1 inserted into a pressure fluid flow path. A sliding valve body 5 that can be retracted against the rear spring 4 is provided at the front, and a poppet valve 7 that is opened by the pressure of the opening 2 acting through the pilot passage 6 is provided at the rear. The main body 1 has a through hole 3 formed on one side thereof with a relief hole 8 that opens when the poppet valve 7 is opened and the sliding valve body 5 is allowed to move backward. It is divided into a front member 1a and a rear member 1b having a poppet valve 7, and both members 1a and 1b are connected to each other by a parallel pin or other connecting means 9.

FIG. 2 shows an example of this, in which the rear member 1b is formed of a solid member so that the front end portion 10 has a circular outer periphery 11.
The through hole 3 of the front member 1a was fitted into the front member 1a, and a connecting means 9 consisting of a parallel pin was inserted from the outside so that both members 1a and 1b were connected to each other.

In this case, it is preferable to form a concave groove 12 on the outer periphery of the front member 1a, and to fit a spring 13 into the concave groove 12 to prevent the parallel pin 9 from falling off. In addition, the rear member 1b has a poppet chamber 14 connected to the through hole 3 of the front member 1a via a pilot passage 6.
At the same time, a discharge hole 15 is formed which extends from the chamber 14 to the outside of the main body 1, and the fluid flowing from the pilot passage 6 into the poppet chamber 14 by pushing open the poppet valve 7 passes through the discharge hole 15. It was made to be discharged to the outside. 16 is a spring that presses the poppet valve 7; 17 is an adjustment screw that adjusts the elastic force of the spring 16; and 18 is a pressure guide hole provided through the sliding valve body 5.

To explain its operation, when the fluid pressure in the opening 2 exceeds the set pressure, that pressure acts on the poppet valve 7 through the pressure guide hole 18 and the pilot passage 6 and pushes it open, so that the sliding valve body 5 The pressure behind the valve element 5 is reduced, and the valve body 5 is allowed to move backward against the spring 4, and the opening 2 is communicated with the relief hole 8 to perform a pressure control operation, as in the conventional valve body. In this way, according to the present invention, the main body 1 is composed of the front member 1a having the through hole 3 and the rear member 1 having the poppet valve 7.
Since the relief valve is divided into parts b and connected together by the connecting member 9, the number of component parts of the relief valve can be reduced, and the number of processing steps can be reduced, resulting in an inexpensive manufacture.

[Brief explanation of the drawing]

Figure 1 is a cutaway side view of a conventional relief valve;
The figure is a cross-sectional side view of an embodiment of the present invention, and FIG. 3 is a cross-sectional view taken along the line -2. 1...Main body, 2...Opening, 3...Sliding hole, 4...
... Spring, 5 ... Sliding valve body, 6 ... Pilot passage, 7 ... Poppet valve, 8 ... Relief hole, 1a
...Front member, 1b... Rear member, 9... Binding means.

Claims (1)

[Scope of utility model registration request] A cylindrical body 1 inserted into a pressure fluid flow path
A sliding hole 3 with an opening 2 at the front is formed inside the valve body, and a sliding valve body 5 which can be retreated against the spring 4 at the rear is provided in front of the sliding hole 3, and a pilot passage 6 is provided at the rear.
A poppet valve 7 is provided on one side of the main body 1 and opens when the poppet valve 7 is opened and the sliding valve body 5 is allowed to retreat. In the case where the relief hole 8 is formed, the main body 1 is attached to the front member 1 having the through hole 3.
A cartridge type relief valve which is divided into a rear member 1b having a poppet valve 7 and a rear member 1b having a poppet valve 7.