JP3152391U - Safety valve 桿 - Google Patents

Abstract

Provided is a safety valve cage that can safely and surely prevent leakage by providing a structure in which a valve port is securely sealed with a valve rod inside a safety blow-off valve unit. A safety valve 桿 1 is a safety valve か ら composed of a valve unit main body 2 and an elastic part 4 that pushes the valve 桿 3A. The safety valve 桿 1 is installed inside the valve unit main body 2 and is moved by the pressing force of the elastic part 4. A spherical shape is provided to the end head part 3B of the valve rod 3A to be configured, and the valve port surface 5a1 of the valve port 5a with which the end head part 3B contacts is formed into an arc shape that matches the spherical shape of the end head part 3B, and is elastic. When the valve rod 3A is pushed to the valve port 5a side by the component 4 to seal the valve port 5a, the valve rod 3A and the valve port surface 5a1 are surely contacted and sealed. [Selection] Figure 1

Description

  The present invention relates to a safety valve 桿, and by forming the closed end head of the valve に into a spherical shape, the valve mouth of the valve device is perfectly aligned with the valve mouth to completely close and effectively open and close the pipeline. It relates to the valve 桿 that can be controlled.

  Conventionally, a valve rod used for opening / closing control of a pipeline such as a safety valve for constant pressure or pressure stabilization or a drain valve device is configured as shown in FIGS. As shown in FIGS. 5 and 6, the valve rod 20 of the safety valve is provided with an end head component 22 used to seal the valve port 21 at the bottom end.

  Conventionally, the end head component 22 is formed as a three-dimensional cone-shaped head. This cone-shaped head is firmly positioned by the cone-shaped inclined side surface sealing the lip of the valve port 21 and achieves the sealing of the flow conduit.

  This end head component 22 is provided with a head tip flat surface 23 at the tip. The end head component 22 is reduced toward the head front end plane 23, and the head front end plane 23 portion is formed to be slightly smaller than the valve port 21.

  A part of the end head component 22 having the conical inclined surface is inserted into the inner edge of the valve port 21, and the insertion and sealing of the valve port 21 by this insertion and the pressing force of the elastic component interposed at the uppermost part are safe and stable. The blockade is achieved.

  However, in the case of the conventional safety valve rod 20, when the internal pressure of the inflow passage is high or the pressure is instantaneously converted to excessively large, the valve rod 20 has the pressing force of the elastic parts and the fluid pressure. Because of the operation of the valve, it is easy to generate a partial vibration state when the valve is closed. In particular, the uppermost end of the cone-shaped inclined surface has a wide head tip flat surface 23, so that it is easy to receive a resistance force when the pipe is blocked.

  The cone-shaped end head component 22 may have uneven pressure return on both sides, and may be in an irregularly inserted state inclined to the valve port 21. Due to this irregular insertion, if the conversion frequency is high, the conical inclined surface of the end head component 22 is wrinkled and becomes non-planar, so that it can be safely sealed even though the valve port 21 is blocked. A state in which fluid leaks occurs.

  Further, the valve rod 20 has a flat end face at the top end of the conical-inclined end head component 22, so that the resistance force when opening and closing is increased, the sound generated during the opening and closing operation is likely to increase, and the opening and closing is also performed. Operation is likely to be delayed.

  Since it is difficult to overcome the frictional breakage of the conical side surface of the end head component 22, a leakage phenomenon is always likely to occur, and the valve unit is always used especially when used for toxic or contaminated fluid control. Not only is it inconvenient to use, but also raises the actual cost of use and creates environmental pollution problems.

  As this type of conventional safety valve rod, there is a relief valve described in Patent Document 1, for example. The relief valve described in Patent Document 1 includes a ball that opens and closes a relief hole of a valve seat, a ball receiver that holds the ball, and a compression coil spring that urges the ball in a direction to close the relief hole. Configured.

JP 2006-207833 A

  The problem to be solved is that in the conventional safety valve rod, a fluid leakage state occurs even though the valve port is blocked. In addition, since the uppermost end of the end head part of the cone-tilt end of the valve rod is a flat end surface, the resistance force at the time of opening and closing increases, the sound of the opening and closing operation tends to be loud, and the opening and closing operation tends to be delayed. Further, since a fluid leakage failure phenomenon is likely to occur, the valve unit must be replaced each time, which is not only inconvenient in use but also increases the cost of use and causes environmental pollution problems.

  Further, in the relief valve described in Patent Document 1, the ball is not fixed to the ball receiver, but is interposed between the ball receiver and the relief hole of the valve seat, and the ball is simply applied to the relief hole. Since the relief hole is opened and closed in contact, even if the ball is urged by a compression coil spring, the relief hole cannot be reliably sealed, and as a result, the above problems have not been solved. .

  Therefore, the present invention has been made in view of the above problems, and a safety valve that can prevent leakage safely and reliably by adopting a structure in which a valve port is securely sealed in a safety blow-off valve unit. The purpose is to provide firewood.

  The present invention provides a safety valve rod which seals the valve port by pushing the valve rod toward the valve port side by an elastic part. When the valve port is opened and closed by forming the end head part of the valve tube into a spherical shape, When the valve is closed due to the contact between the valve head and the valve mouth, the end head parts are displaced and a gap is created between the valve head and the valve mouth. The valve unit prevents the leakage of the valve unit safely and surely by the spherical contact surface of the spherical head end.

  This school plan has improved the defect that it becomes impossible to cope with the partial vibration due to the closed end of the sphere, and the opening and closing operation of the entire valve unit has been made perfect to meet the current environmental protection.

  The safety valve rod of the present invention has an advantage that leakage can be prevented safely and reliably by having a structure in which the valve port is securely sealed with the valve rod within the safety blow-off valve unit.

The disassembled perspective view which shows the valve rod structure of the blow-off valve unit which concerns on the Example of this invention. The reference drawing which shows the external appearance of the valve rod of the blow-off valve concerning a present Example. The reference figure which shows the assembly state of the blow-off valve rod in the valve instrument in a present Example. Explanatory drawing which shows the state in which a pressure rod receives an internal pressure in this example, and vibrates. The perspective view which shows the valve rod of the conventional blow-off unit. Explanatory drawing which shows the state which the valve rod of the conventional blow-off unit received the internal pressure, and opened and closed partially.

Embodiments of the present invention will be described below with reference to the drawings.
[Example]
The safety valve rod of the present embodiment is exemplified by the structure of a general safety drain valve unit.
As shown in FIG. 1, the safety valve 桿 1 of the present embodiment has a valve unit main body 2 that constitutes a valve device of a safety drain valve unit, a valve 桿 unit 3 having a valve 桿 3A, and an elastic part 4. Configured.

  The valve unit main body 2 is screwed and fixed to the first main body 2A, the second main body 2B screwed and fixed in the first main body 2A, and the upper portion of the second main body 2B. And a lid portion 2C.

  A valve port portion 5 having a valve port 5a is provided in the first main body 2A. The valve opening 5 is fixed in the first main body 2A by screwing the second main body 2B into the first main body 2A. Further, a drainage channel 9 that is a flow conduit communicating with the valve port 5a is provided in the first main body 2A.

  Further, a valve rod unit 3 having a valve rod 3A, an elastic component 4, and pressing members 3C and 6 are installed in the second main body 2B. One pressing member 3C is fixed to the base end side of the valve rod 3A, and the other pressing member 6 is fixed to the inside of the lid portion 2C (see FIG. 3).

  As shown in FIGS. 1 to 3, the valve rod unit 3 is provided in the valve rod 3A, an end head component 3B provided at the tip of the valve rod 3A, and each outer circumferential groove 3x of the valve rod 3A. The plurality of O-rings 7 and the pressing member 3C are configured to be movably provided in the second main body 2B.

  Then, the valve rod 3A of the valve rod unit 3 is inserted into the second main body 2B, and further, the elastic component 4 is inserted into the second main body 2B so as to contact the pressing member 3C on the base end side, In this state, the valve 2 </ b> A is pushed toward the valve opening 5 by the pressing force of the elastic component 4 by screwing the lid 2 </ b> C into the second main body 2 </ b> B.

  The O-ring 7 attached to the valve rod 3A is a member for shielding the outer peripheral groove 3x of the valve rod 3A and the inner peripheral surface of the second main body 2B. Further, the first main body 2A and the second main body 2B are shielded by another O-ring 8 as shown in FIG.

  A specific configuration of the valve 3A of the safety valve 1 according to this embodiment is shown in FIG.

  As shown in FIG. 2, the valve rod 3A is provided with an end head part 3B for sealing the valve port 5a by the pressing force of the elastic part 4 at the uppermost end. The end head component 3B is configured in a spherical shape, and the spherical surface 3B1 is aligned with the valve port surface 5a1 of the valve port 5a. The valve port surface 5a1 of the valve port 5a is configured in a shape corresponding to the spherical shape (spherical surface 3B1) of the end head part 3B of the valve rod 3A, that is, an arc shape (see FIGS. 1 and 3). .

  Further, the spherical end head component 3B has a spherical diameter larger than that of the valve port 5a, and the drainage channel 9 is completely closed by the arc-shaped valve port surface 5a1 through which the spherical shape passes, so that It controls the blocking and distribution of running water.

  As described above, the valve rod 3A securely closes the valve port 5a communicating with the drainage hole by the pressing force of the elastic component 4 installed in the second main body 2B, and closes the drainage channel 9. And normalize the distribution of incoming and outgoing water.

  Further, in the safety valve 本 1 of the present embodiment, the valve 桿 3 </ b> A is used when the pressure value inside the valve unit body 2 greatly increases from the safety set value, that is, the elasticity of the elastic component 4 inside the valve unit body 2. Against this, the elastic part 4 is pushed back to remove it from the position of the valve port 5a which sealed the valve rod 3A, a communication hole is opened, and a predetermined amount is discharged.

  When the pressure value in the valve body unit 2 decreases, the valve rod 3A returns to the position where the valve port 5a is sealed again by the pressing force of the elastic component 4. When the elasticity of the elastic part 4 is recovered, the valve rod 3A is closed on the valve port surface 5a1 of the valve port 5a by the fluid shape of the valve rod 3A, and completely seals the valve port 5a.

  The end head part 3B of the valve rod 3A according to the present embodiment is formed in a fluid, and the greatest feature thereof is that it is not related to the contact of the cone inclined surface and is the same as the sphere diameter of the sphere. It is done. When the internal pressure of the valve unit main body 2 is unstable, particularly when the elastic component 4 expands and contracts abnormally due to the pressure generated by the vibration caused by the pressure conversion, the valve rod 3A moves due to the biased movement (see FIG. 4).

  In this case, the end head component 22 of the conventional valve rod 20 is provided with a conical side surface (head end plane 23: see FIG. 6), and the valve port 21 should be sealed by such sliding of the vibration. There was a situation where the location did not stop firmly and the fluid leaked.

  However, as described in the above embodiment, the shape of the end head component 3B of the valve rod 3A can be formed into a curved surface with a diameter of the valve port 5a. By forming the end head part 3B of the valve rod 3A into a spherical shape having a spherical surface 3B1, it also has the effect of automatic adjustment, and the joint between the valve rod 3A and the valve port 5a is safe and stable and ensures the opening and closing operation. Can be.

  Further, the spherical end head part 3B reduces the resistance force received more securely during the closing operation, ensures the operation of the valve rod 3A, greatly reduces noise by the resistance at the time of opening and closing, The operation control of the entire valve unit 1 can be ensured, safe and stable.

  On the other hand, the failure rate when using the valve unit is greatly reduced, the friction damage phenomenon during opening and closing operations is effectively reduced to improve the problems that occur during use, and the valve unit as a whole is more practical for environmental protection Can be. The technology of the entire valve structure does not require any changes, and no special technology is required, and the valve unit opening / closing discharge opening / closing control makes it easier to use and meets environmental protection.

  As described above, the safety valve の of the present invention has a configuration in which a spherical shape is installed directly on the end head part of the valve 、, thereby smoothly opening and closing corresponding to the conversion of the internal pressure of the valve unit body, and conversion adjustment Sometimes acts quickly and safely.

  In the embodiment according to the present invention, the valve port surface 5a1 of the valve port 5a has been described as being formed in an arc shape that matches the spherical shape of the end head component 3B. However, the present invention is not limited to this. For example, you may comprise in a shape like a cone inclined surface.

  The present invention is not limited to the embodiments described above, and various modifications can be made without departing from the spirit of the invention.

1 ... Safety valve 桿,
2 ... Valve unit body,
2A ... first body,
2B ... second body,
2C ... lid,
3… Valve rod unit,
3A… Valve 桿,
3B ... end head parts,
3C ... pressing member,
3x ... outer peripheral groove,
4 ... elastic parts,
5 ... Valve mouth,
5a ... Valve opening,
5a1 ... Valve mouth surface,
6 ... Pressing member,
7, 8 ... Ring,
9 ... Drainage channel.

Claims (2)

In the safety valve 桿 composed of the valve unit body and elastic parts that push the valve 桿,
A spherical shape is provided in the end head part of the valve rod which is installed inside the valve unit main body and moves by the pressing force of the elastic part, and the valve mouth surface of the valve port in contact with the end head part is provided as a sphere of the end head part. It is configured in a circular arc shape that matches the shape, and when sealing the valve port by pushing the valve rod toward the valve port side by the elastic part, the valve port and the valve port surface are securely in contact with each other and sealed. Safety valve と す る.   2. The safety valve rod according to claim 1, wherein the diameter of the sphere of the end head component of the valve rod is larger than the diameter of the valve port.

Images