TWI557348B - Valve rod assembly - Google Patents

Description

Stem set

The invention relates to the technical field of a solenoid valve, in particular to a valve stem group applied to a solenoid valve which can effectively improve the sealing effect of the solenoid valve.

As is well known, solenoid valves are widely used as a valve to control the flow direction of the fluid; thus, when the electromagnet in the solenoid valve is energized or de-energized, the valve stem can be driven to allow fluid to pass or block the fluid to control the flow of the fluid. The purpose of the direction. Please refer to the first A diagram and the first B diagram, which are perspective views of a conventional solenoid valve; and, referring to the second diagram at the same time, a side cross-sectional view of a conventional solenoid valve. As shown, the conventional solenoid valve 1' is mainly composed of an electromagnet module 11', a valve body 12' and a valve stem group 13'.

Continuing to refer to the third and fourth figures, a perspective view and an exploded view of the valve stem group. As shown, the solenoid valve 1' has an internal shaft member 131', a movable iron core 132', a stopper 133', a plug seal 134' (plug seal), and a set of rings 135'. An upper O-ring 136' (upper nozzle) and a lower O-ring 137' (lower nozzle). Please refer to FIG. 2, FIG. 3 and FIG. 4 at the same time. When the electromagnet module 11' is energized, the coil 111' in the electromagnet module 11' generates a magnetic force and pushes the movable iron core 132' toward the axis. The top of the core 131' moves, thereby pushing the core 131' through a compression spring 138', causing the shaft The core 131' moves toward a nozzle 121' in the valve body 12'; finally, the head 1311' of the shaft 131' is engaged with the nozzle 121' through the lower O-ring 137', while the plug seal 134' is against the nozzle 121' to block the gas of the first valve port 124' from entering the valve body 12' via the nozzle 121'. At this time, the gas system flowing in from the second valve port 122' can flow out through the third valve port 123' of the valve body 12'.

Although the aforementioned valve stem group 13' is often used in the solenoid valve 1', the valve stem group 13' still has the following drawbacks in terms of practical application:

(1) Since the plug seal 134' is usually formed on the core 131' by an injection molding process, once the plug seal 134' is used for long-term use of the solenoid valve 1' For deformation or damage, the maintenance engineer can only perform maintenance of the solenoid valve 1' by replacing the valve body 12' with the valve stem group 13'. Such a maintenance method obviously causes the maintenance cost of the solenoid valve 1' to remain high.

(2) Although the plug seal 134' is overlaid with a solid collar 135'; however, when gas is injected into the valve body 12' via the nozzle 121', the plug seal 134' The bottom portion must withstand the injection pressure of the gas; in addition, since the plug seal 134' is disposed between the upper limit portion 1312' of the shaft core 131' and the lower limit portion 1313', the movable iron core 132' is downward. When the shaft core 131' is pushed, the plug seal 134' must also withstand the pushing force of the upper limit portion 1312'. Therefore, after the solenoid valve 1' is used for a long period of time, the top and bottom of the plug seal 134' may be concavely deformed or damaged due to the long-term pressing force and the injection pressure.

Therefore, in view of the fact that the valve stem group 13' of the conventional solenoid valve 1' still has drawbacks in use, the inventors of the present invention have vigorously studied and invented, and finally developed a valve stem group applied to the solenoid valve of the present invention.

The main object of the present invention is to provide a valve stem assembly, wherein the inner wall of the plug seal of the valve stem group is formed with two annular grooves, and the shaft core of the valve stem group is correspondingly formed with two rings. The convex portion; such a design allows the user to manually assemble the plug seal to the shaft core of the valve stem group without the need for an additional injection molding process. Moreover, the user can also manually remove the plug seal assembly from the shaft core of the valve stem group; that is, the special design of the plug seal and the hollow shaft of the present invention enables use The plug seal on the shaft core can be replaced by itself.

Therefore, in order to achieve the above object of the present invention, the inventors of the present invention have proposed a valve stem assembly which is mounted in a valve body of a solenoid valve and simultaneously connects an electromagnet module of the solenoid valve, the valve stem assembly The utility model comprises: a hollow shaft, wherein: a shaft head having a diameter reduction is used for engaging a lower nozzle of the valve body through a O-ring of the valve body when the valve stem group is actuated; Connecting a movable iron core in the electromagnet module; a middle portion is between the shaft head and the shaft tail; a setting portion is adjacent to the shaft head, wherein the setting portion is formed opposite to each other a second annular protrusion; and a sliding section between the middle section and the setting section for penetrating an upper nozzle and an upper O-ring in the valve body and sliding therein; a plug seal, The sleeve is sleeved over the setting section, wherein the plug seal is a hollow colloid sleeve, and an inner wall thereof forms a second annular groove for inserting the two annular protrusions; A set of rings is sleeved over the plug seal.

<present invention>

1‧‧‧Valve set

2‧‧‧ valve body

3‧‧‧Electromagnetic Module

11‧‧‧ hollow shaft

13‧‧‧ plug seals

14‧‧‧ collar

111‧‧‧Axis head

112‧‧‧Axis tail

113‧‧‧ middle section

12L‧‧‧O-ring

21‧‧‧ lower nozzle

31‧‧‧ movable core

311‧‧‧ joint groove

114‧‧‧Setting section

22‧‧‧Upper nozzle

1141‧‧‧ annular convex

115‧‧‧Sliding section

12U‧‧‧O-ring

12M‧‧O-ring

15‧‧‧Fixed parts

1143‧‧‧Conical abutment

131‧‧‧ annular groove

141‧‧‧ annular bumps

1411‧‧‧Bevel

1412‧‧‧Vertical

16‧‧‧Compressed spring

142‧‧‧ring lobes

17‧‧ ‧block

25‧‧‧First valve port

26‧‧‧Second valve port

27‧‧‧ third valve port

32‧‧‧ coil

<知知>

1'‧‧‧ solenoid valve

11'‧‧‧Electromagnetic Module

12’‧‧‧ valve body

13’‧‧‧Valve set

111’‧‧‧ coil

138’‧‧‧Compressed spring

131’‧‧‧ shaft core

132’‧‧‧ movable core

133’‧‧‧block

134'‧‧‧ plug seals

135’‧‧‧ collar

136’‧‧‧O-ring

137’‧‧‧O-ring

138’‧‧‧Compressed spring

121'‧‧‧Nozzles

1311’‧‧‧ head

1312’‧‧‧ upper limit

1313’‧‧‧ Lower Limit

124’‧‧‧first valve port

122’‧‧‧second valve port

123’‧‧‧ third valve port

1A and 1B are perspective views of a solenoid valve; the second diagram is a side cross-sectional view of a conventional solenoid valve; the third diagram is a perspective view of the valve stem group; and the fourth diagram is a valve stem group. 5 is a side cross-sectional view of a solenoid valve to which the valve stem of the present invention is mounted; the sixth diagram is a perspective view of the valve stem group; the seventh diagram is an exploded view of the valve stem group; and the eighth diagram is hollow Side view of the shaft, plug seal and collar.

In order to more clearly describe the valve stem set of a solenoid valve of the present invention, a preferred embodiment of the present invention will be described in detail below with reference to the drawings.

Referring to FIG. 5, a side cross-sectional view of a solenoid valve with a valve stem assembly of the present invention is provided. As shown in FIG. 5, the valve stem assembly 1 of the present invention is mounted on a valve body of a solenoid valve. The electromagnet module 3 of one of the solenoid valves is connected to the inside of the solenoid valve 2; the components of the valve stem group 1 mainly include: a hollow shaft 11, a plug seal 13 and a set of rings 14.

Continue to see the fifth picture, and please refer to the sixth and seventh pictures at the same time. A perspective view and an exploded view of the valve stem group. As shown, the hollow shaft 11 of the valve stem group 1 has a shaft head 111 having a diameter reduction, a shaft tail 112, and a middle portion 113 between the shaft head 111 and the shaft tail 111; wherein the shaft head 111 When the valve stem group 1 is actuated, the lower nozzle 21 in the valve body 2 is engaged through the lower O-ring 12L in the valve body 2. Moreover, the movable iron core 31 has an engaging groove 311, so that the shaft tail 112 of the hollow shaft 11 can be embedded in the engaging groove 311 to connect the movable iron core 31 in the electromagnet module 3. Specifically, in the present invention, a hollow portion 11 is formed with a setting portion 114 adjacent to the shaft head 111, and two annular convex portions 1141 are formed on the upper surface of the mounting portion 114, and one of the rings is formed. The protrusion 1141 is adjacent to the shaft head 111.

In addition, in the present invention, a sliding section 115 is formed on the hollow shaft 11 between the middle section 113 and the setting section 114. As shown, the sliding section 115 is adjacent to the other annular projection 1141; and, since the diameter of the sliding section 115 is smaller than the diameter of the setting section 114 and the middle section 113, the sliding section 115 can penetrate the valve body 2 The upper nozzle 22 is slid and slid therein. In addition, an upper O-ring 12U is disposed above the sliding section 115. In addition, an O-ring 12M is disposed in the valve body 2 with the aid of a fixing member 15, and the O-ring 12M is located at the middle portion 113 of the hollow shaft 11.

Continue to refer to the fifth, sixth and seventh figures, and also refer to the eighth figure, which is a side view of the hollow shaft, the plug seal and the collar. As shown, the plug seal 13 is sleeved over the set section 114, and the plug seal 13 is a hollow colloidal sleeve. In the design of the present invention, in particular, a tapered abutting member 1143 is formed between the setting portion 114 and the sliding portion 115, and the tapered abutting member 1143 is used together with the shaft head 111 as the plug. One of the limiting structures of the seal 13 is. In addition, the middle The inner wall of the empty colloidal sleeve (ie, the plug seal 13) forms a two annular groove 131 for the two annular projections 1141 to be embedded, thereby securing the plug seal 13 to a stable position. This setting section 114 is above.

Please refer to the fifth, sixth, seventh and eighth diagrams at the same time. As shown in the figure, the collar 14 is sleeved on the plug seal 13 and the inner wall of the collar 14 is formed with an annular projection 141. The two sides of the annular projection 141 are Each of the inclined surface 1411 and the vertical surface 1412 respectively face the top edge and the bottom edge of the plug seal 13 . In addition, the bottom lip of the collar 14 is formed with an annular projection 142 such that a compression spring 16 can be disposed between the annular projection 142 and the upper O-ring 12U. It should be noted that a stopper 17 is disposed in the valve body 2 and located at the middle portion 113 of the hollow shaft 11 for blocking the movable iron core 31 from continuing to move toward the lower nozzle 21 .

Thus, the above has fully explained all the components of the valve stem assembly 1 of the present invention. Hereinafter, the operation of the valve stem assembly 1 will be further described, so that those skilled in the art can better understand the technical features of the valve stem assembly 1. . As shown in the fifth, sixth, seventh and eighth figures, when the electromagnet module 3 is energized, the inner coil 32 generates a magnetic force to force the movable core 31 toward the hollow shaft 11. The shaft tail 112 moves to push the shaft tail 112; at this time, the hollow shaft 11 is moved toward the lower nozzle 21 by the pushing of the movable iron core 31, and the shaft head 111 is transmitted through the lower O shape in the valve body 2. The lower nozzle 21 is engaged by the ring 12L such that the plug seal 13 seals the lower nozzle 21. Thus, the gas flowing in from the first valve port 25 cannot enter the valve body 2 via the lower nozzle 21. Conversely, gas flowing in from the second valve port 26 can enter the valve body 2 via the upper nozzle 22 and then flow out of the valve body 2 via the third valve port 27.

According to the above description, when the energization of the electromagnet module 3 is stopped, the magnetic force generated by the coil 32 disappears instantaneously. At this time, the hollow shaft 11 is directed toward the movable type by the force of one of the compression springs 16. The direction of the iron core 31 is moved, and finally the plug seal 13 and the upper O-ring 12U seal the upper nozzle 22. Thus, the gas flowing in from the second valve port 26 cannot enter the valve body 2 via the upper nozzle 22. Conversely, the gas flowing in from the first valve port 25 can enter the valve body 2 via the lower nozzle 21 and then flow out of the valve body 2 via the third valve port 27.

Thus, the above-mentioned system has completely and clearly explained the constituent elements of the valve stem group of the present invention and related technical features, and, through the above, we can know that the present invention has the following advantages:

(1) In the valve stem group 1 of the present invention, particularly, the inner wall of the plug seal 13 is formed with two annular grooves 131 corresponding to the shaft core (i.e., the hollow shaft 11). The two annular protrusions 1141 are formed; thus, the user can manually assemble and fix the plug seal 13 to the shaft core of the valve stem group 1 without passing through an additional injection molding process. Moreover, the user can also manually remove the plug seal 13 from the shaft core of the valve stem group 1; that is, the special design of the plug seal 13 and the hollow shaft 11 of the present invention. The user is able to replace the plug seal 13 on the shaft core by himself.

(2) The present invention further forms an annular projection 141 on the inner wall of the collar 14 for pressing the plug seal 13 to prevent the plug seal 13 from being received by the annular projection 1141 on the core. The two sides of the annular projection 141 are respectively a slope 1411 and a vertical surface 1412; thus, when the movable core 31 pushes down the core (ie, At the time of the hollow shaft 11), the inclined surface 1411 and the annular convex portion 1141 can generate a cushioning function to protect the plug seal 13 from plugging. The sealing member 13 directly receives the pushing force of the movable iron core 31. Further, when the gas is injected into the valve body 2 through the lower nozzle 21, the vertical surface 1412 and the annular convex portion 1141 can also exert a resistance to support The plug seal 13 allows the plug seal 13 to withstand the injection pressure of the gas without being deformed.

It is to be understood that the foregoing detailed description of the embodiments of the present invention is not intended to Both should be included in the scope of the patent in this case.

13‧‧‧ plug seals

14‧‧‧ collar

111‧‧‧Axis head

112‧‧‧Axis tail

113‧‧‧ middle section

114‧‧‧Setting section

1141‧‧‧ annular convex

115‧‧‧Sliding section

131‧‧‧ annular groove

141‧‧‧ annular bumps

1411‧‧‧Bevel

1412‧‧‧Vertical

Claims (8)

A valve stem assembly is mounted in a valve body of a solenoid valve and simultaneously connected to an electromagnet module of the solenoid valve. The valve stem assembly comprises: a hollow shaft having a shaft head with a diameter reduction When the valve stem set is actuated, a lower O-ring of the valve body is engaged through a lower O-ring of the valve body; a shaft tail is connected to a movable iron core in the electromagnet module; a middle section Between the shaft head and the tail of the shaft; a set section adjacent to the shaft head, wherein the set section is formed with two annular convex portions opposite to each other; and a sliding section between the middle section and Between the set segments, an upper nozzle and an upper O-ring are passed through the valve body and slid therein; a plug seal is sleeved on the setting section, wherein the plug type The sealing member is a hollow colloidal sleeve, and an inner wall thereof forms a two annular groove for inserting the two annular convex portions; and a set of rings is sleeved on the plug sealing member. The valve stem set of claim 1, wherein the movable iron core has an engagement groove for connecting the shaft tail of the hollow shaft. The valve stem group of claim 1, wherein the collar The inner wall is formed with an annular projection for pressing the plug seal. The valve stem set of claim 1, wherein the two annular projections are adjacent to the shaft head and the sliding section, respectively. The valve stem set of claim 1, wherein the diameter of the sliding section is smaller than the diameter of the setting section and the middle section. The valve stem set according to claim 1, wherein the setting section and the sliding section are formed with a tapered abutting member, and the tapered abutting member and the shaft head are simultaneously used as the plug type. One limit structure of the seal. The valve stem assembly of claim 3, wherein the two sides of the annular projection are respectively a slope and a vertical surface. The valve stem set of claim 3, wherein the bottom edge of the collar is formed with an annular projection so that a compression spring can be disposed on the annular projection.