TWM679776U - Anti-overlock manual valve - Google Patents

Abstract

An anti-lock manual valve includes a knob, a valve stem, a sliding member, a first elastic member, a housing, a second elastic member, and a valve seat. The knob is rotatable about an axis. The valve stem has a first section and a second section connected together. The first section has an external thread, and the second section does not have an external thread. The sliding member has a first... A first shaft hole has an internal thread that mates with the external thread, and the sliding member and the knob can rotate synchronously; the housing has a second shaft hole, and the valve stem passes through the second shaft hole. The valve stem is partially disposed in the housing in such a way that it can move relative to the housing along the axis but cannot rotate relative to the housing with the axis as the center.

Description

Anti-overlock manual valve

This invention relates to manual valves; in particular, it refers to a type of anti-overlock manual valve.

It is known that a manual valve generally includes a knob, a valve stem, and a valve seat. When in use, the user can rotate the knob clockwise or counterclockwise to move the valve stem up and down, thereby opening or closing the flow path in the valve seat.

However, manually operated valves are also prone to damage due to improper operation by personnel or different forces applied by each person. For example, when a user turns the knob to close the flow path, if the user overtightens the knob, it may cause deformation or damage to the manually operated valve. Therefore, how to provide a manually operated valve that can prevent users from overtightening it is an urgent problem to be solved.

In view of this, the purpose of this invention is to provide an anti-overlock manual valve that can prevent the user from overlocking.

To achieve the above objectives, the present invention provides an anti-locking manual valve comprising a knob, a valve stem, a sliding member, a first elastic member, a housing, a second elastic member, and a valve seat. The knob is rotatable about an axis. The valve stem has a first section and a second section connected together. The first section has an external thread, and the second section does not have an external thread. The sliding member has a first shaft hole, and the interior of the first shaft hole has an internal thread that mates with the external thread. The sliding member and the knob are rotatable synchronously. The two opposite ends of the first elastic member abut against the knob and the sliding member, respectively. The housing has a second shaft hole through which the valve stem passes. In the shaft hole, the valve stem is partially disposed in the housing in such a way that it can move relative to the housing along the axis but cannot rotate relative to the housing with the axis as the center; the two opposite ends of the second elastic member abut against the inner wall of the housing at the second shaft hole and one abutment portion of the valve stem, respectively; the valve seat has an opening; wherein, when the valve seat is in a closed state, the first elastic member provides a first elastic force to push against the sliding member, so that the first shaft hole of the sliding member contacts the first section of the valve stem and one end of the valve stem closes the opening, at which time, when the knob rotates in a first rotation direction, it can drive the sliding member to rotate in the first rotation direction, when the knob rotates in a first rotation direction... When the knob rotates in the second rotation direction, it drives the sliding member to rotate in the second rotation direction. The internal thread of the first shaft hole of the sliding member engages with the external thread of the first section of the valve stem. The sliding member moves along the axis in a first axial direction toward the second section, thereby driving the valve stem to move along the axis in a second axial direction. The end of the valve stem disengages and opens the opening, thus putting the valve seat in an open state. The first rotation direction and the second rotation direction are opposite rotation directions, and the first axial direction and the second axial direction are opposite directions. When the knob continues to rotate in the second rotation direction, the first shaft of the sliding member... When the hole moves to the second section and forms freewheeling, the sliding member rotates relative to the valve stem in the second rotation direction. At this time, the second elastic member provides a second elastic force to push against the valve stem, causing the first shaft hole of the sliding member to contact the first section of the valve stem. When the knob rotates in the first rotation direction, it can drive the sliding member to rotate in the first direction. When the rotation direction is changed, the internal thread of the first shaft hole of the sliding member engages with the external thread of the first section of the valve stem. The sliding member moves along the axis in the second axial direction, thereby driving the valve stem to move along the axis in the first axial direction. The end of the valve stem closes the opening, thus putting the valve seat in the closed state.

The effect of this invention is that when the valve seat is in the closed state, if the user continues to turn the knob in the first rotation direction, the knob will enter a free-spinning state and will not drive the valve stem because the internal thread of the sliding member does not engage with the external thread of the valve stem. In addition, when the valve seat is in the open state, if the user continues to turn the knob in the second rotation direction, the knob will enter a free-spinning state and will not drive the valve stem because the sliding member is located in the second section of the valve stem without external threads. Thus, the knob can achieve the technical effect of preventing the user from over-tightening in both rotation directions.

To more clearly illustrate this invention, a preferred embodiment is described below with detailed illustrations. Please refer to Figures 1 to 7, which show a preferred embodiment of the anti-locking manual valve 1, comprising a knob 10, a valve stem 20, a sliding member 30, a first elastic member 40, a housing 50, a second elastic member 60, and a valve seat 70.

Referring to Figures 5 and 6, one side of the housing 50 is secured to the valve seat 70 by a plurality of screws, and a plurality of cover plates 72 are correspondingly provided to cover the screw holes and screws. The other side of the housing 50 is connected to the knob 10. As shown in Figure 4, the bottom of the knob 10 has a hook portion 102 that engages with an annular recess 503 on the outer periphery of the housing 50, thereby allowing the knob 10 to rotate relative to the housing 50 about an axis A.

As further explained in Figure 4, the anti-overlock manual valve 1 further includes a locking ring 80. The locking ring 80 has an engagement groove 802 extending along the axis A. The outer peripheral wall of the knob 10 has an engagement member 103 that engages with the engagement groove 802. Thus, the locking ring 80 can move up and down relative to the knob 10 along the axis A. In addition, an inner wall tooth 806 is provided at the opening at one end of the locking ring 80, and the outer peripheral wall of the housing 50 is provided with a tooth 806 that can engage with the inner wall tooth 806. When the locking ring 80 has an outer wall tooth 502 that engages with the outer wall tooth 502 of the housing 50, the knob 10 is restricted by the locking ring 80 and cannot rotate relative to the housing 50. Conversely, if the locking ring 80 is pushed up, the inner wall tooth 806 of the locking ring 80 can disengage from the outer wall tooth 502 of the housing 50, allowing the knob 10 to rotate relative to the housing 50, and the locking ring 80 moves in tandem with the locking ring 80.

As shown in Figure 4, the knob 10 has a central shaft hole 104, through which a shaft 22 passes, and one end of the shaft 22 passes through a recess 202 at one end of the valve stem 20. The valve stem 20 has a first segment 204, a second segment 206, and a third segment 208 connected in sequence. The first segment 204 has the recess 202 and an external thread 2041, while the surface of the second segment 206 is a smooth surface without external threads. The sliding member 30 has a first shaft hole 302, and the interior of the first shaft hole 302 has an internal thread 302a that mates with the external thread 2041.

The outer peripheral wall of the third segment 208 of the valve stem 20 has a first protrusion 208a, and the inner wall of the housing 50 has a first elongated slot 504 extending along the axis A. The first protrusion 208a is accommodated in the first elongated slot 504 in a manner that allows it to move along the axis A. The first elongated slot 504 restricts the rotation of the valve stem 20, that is, the valve stem 20 can only move up and down on the axis A, and cannot rotate relative to the housing 50 around the axis A.

Furthermore, as shown in Figure 3, the outer peripheral wall of the slider 30 has a second protrusion 303, and the inner wall of the knob 10 has a second elongated slot 106 extending along the axis A. The second protrusion 303 is accommodated in the second elongated slot 106 in a manner that allows it to move along the axis A. In this way, the slider 30 can move up and down relative to the knob 10 on the axis A, and when the knob 10 rotates, the slider 30 is restricted by the second elongated slot 106 and can rotate synchronously with the knob 10.

As shown in Figure 4, the housing 50 has a second shaft hole 506, and the valve stem 20 passes through the second shaft hole 506. The outer diameter of the first segment 204 of the valve stem 20 is larger than the outer diameter of the second segment 206. The second shaft hole 506 of the housing 50 has an internal thread that mates with the external thread 2041. Thus, during installation, the first segment 204 of the valve stem 20 can be screwed into (through) the second shaft hole 506 of the housing 50 by the external thread 2041. In addition, through the mating of the inner diameter of the second shaft hole 506 and the outer diameter of the second segment 206 of the valve stem 20, the valve stem 20 can be stably mounted on the axis A.

Referring to Figure 4, in this embodiment, both the first elastic member 40 and the second elastic member 60 are compression springs. The two opposite ends of the first elastic member 40 abut against the inner wall of the knob 10 and the top of the sliding member 30, respectively. The top of the sliding member 30 has a protrusion 304, thereby allowing one end of the first elastic member 40 to be fitted onto the protrusion 304, preventing… Slippage; the second elastic member 60 is sleeved on the valve stem 20, and the two opposite ends of the second elastic member 60 respectively abut against the inner wall of the housing 50 at the second shaft hole 506 and one abutment portion 210 of the valve stem 20. The abutment portion 210 is located at the third section 208 of the valve stem 20 and extends outward from the outer peripheral wall of the valve stem 20.

Referring to Figure 4, the valve seat 70 has an opening 702 on its upper part, which is connected to a flow channel 704 of the valve seat 70. When the locking ring 80 is pushed up, the valve seat 70 is in a closed state S1 as shown in Figure 4. The first elastic member 40 provides a first elastic force to push against the sliding member 30, so that the first shaft hole 302 of the sliding member 30 contacts the first section 204 of the valve stem 20, and one end 20a of the valve stem 20 seals the opening 702. At this time, the knob 10 rotates in a first rotation direction R1. When rotated (for example, clockwise), the sliding member 30 can be driven to rotate synchronously in the first rotation direction R1. However, since the internal thread 302a (for example, left-hand thread) of the first shaft hole 302 of the sliding member 30 and the external thread 2041 (for example, left-hand thread) of the first segment 204 of the valve stem 20 do not mesh, the valve stem 20 will not move relative to the sliding member 30.

When the knob 10 rotates in a second rotation direction R2 (e.g., counterclockwise), it drives the sliding member 30 to rotate synchronously in the second rotation direction R2. At this time, the sliding member 30 is pushed against the first section 204 of the valve stem 20 by the first elastic member 40, and the internal thread 302a of the first shaft hole 302 of the sliding member 30 engages with the external thread 2041 of the first section 204 of the valve stem 20. Thus, the sliding member 30 moves along the... Axis A moves toward the second segment 206 in a first axial direction A1, while simultaneously moving the valve stem 20 along axis A in a second axial direction A2. The end 20a of the valve stem 20 disengages and opens the opening 702, so that the valve seat 70 is in an open state S2 as shown in FIG5. The first rotation direction R1 and the second rotation direction R2 are opposite rotation directions, and the first axial direction A1 and the second axial direction A2 are opposite directions.

When the valve seat 70 is in the open state S2, and the knob 10 is continuously rotated in the second rotation direction R2, the sliding member 30 rotates synchronously with the valve stem 20 in the second rotation direction R2. The first shaft hole 302 of the sliding member 30 moves along the axis A in the first axial direction A1 to the second segment 206 and forms free rotation. At this time, the second elastic member 60 is compressed by the abutment portion 210 of the valve stem 20, and the second elastic member 60 provides a second elastic force to push against the valve stem 20, so that the first shaft hole 302 of the sliding member 30 and the first segment 206 of the valve stem 20 are connected. 04 Contact, if the knob 10 rotates in the first rotation direction R1, it can synchronously drive the sliding member 30 to rotate in the first rotation direction R1, and the internal thread 302a of the first shaft hole 302 of the sliding member 30 is screwed with the external thread 2041 of the first section 204 of the valve stem 20. The sliding member 30 moves along the axis A in the second axial direction A2, thereby driving the valve stem 20 to move along the axis A towards the first axial direction A1. The end 20a of the valve stem 20 closes the opening 702, so that the flow channel 704 of the valve seat 70 is in the closed state S1. Based on the above, the knob 10 can achieve the technical effect of preventing the user from over-tightening it in both rotational directions. In addition, when the valve seat 70 is in the closed state S1 as shown in FIG. 4, the shaft 22 is located in the central shaft hole 104 and is not exposed. When the valve seat 70 is in the open state S2 as shown in FIG. 5, the shaft 22 partially protrudes from the central shaft hole 104, thereby facilitating the user to identify the open and closed state of the valve seat 70.

Furthermore, the first segment 204 of the valve stem 20 includes a first part 204a, a second part 204b, and a third part 204c connected in sequence. The third part 204c is connected to the second segment 206. The outer diameter of the first part 204a gradually expands from its end toward the connection between the first part 204a and the second part 204b. The outer diameter of the third part 204c gradually narrows from its connection with the second part 204b toward the connection between the third part 204c and the second segment 206. The first shaft hole 302 of the sliding member 30 has an opening 302c and 302d on opposite sides, and the diameter of each opening 302c and 302d gradually narrows from the outside to the inside of the first shaft hole 302.

In summary, the effect of this invention is that when the valve seat 70 is in the closed state S1, if the user continuously rotates the knob 10 in the first rotation direction R1, since the internal thread 302a of the sliding member 30 does not engage with the external thread 2041 of the valve stem 20, the knob 10 will enter a free-spinning state and will not drive the valve stem 20 to operate; in addition, when the valve seat 70 is in the closed state S1, the knob 10 will enter a free-spinning state and will not drive the valve stem 20 to operate; furthermore, when the valve seat 70 is in the closed state S1, the knob 10 will enter a free-spinning state and will not drive the valve stem 20 to operate. When 70 is in the open state S2, the user continues to rotate the knob 10 in the second rotation direction R2. Since the slider 30 is located in the second section 206 of the valve stem 20 which does not have external threads, the knob 10 will enter the free-spinning state and will not drive the valve stem 20 to operate. In this way, the knob 10 can achieve the technical effect of preventing the user from over-tightening in both rotation directions.

The above description is merely a preferred embodiment of the invention. Any equivalent changes made in accordance with the invention specification and the scope of the patent application should be included within the scope of the invention.

1: Anti-lock manual valve; 10: Button; 102: Hook; 103: Engaging part; 104: Central shaft hole; 106: Second elongated slot; 20: Valve stem; 202: Recess; 204: First section; 2041: External thread; 204a: First part; 204b: Second part; 204c: Third part; 206: Second section; 208: Third section; 208a: First protrusion; 20a: End; 210: Abutment part; 22: Shaft; 30: Sliding part; 302: First shaft hole; 302a: Internal thread; 302c, 302d: Opening; 303: Second protrusion; 304: Protrusion; 40: First elastic element; 50: Housing. 502: Outer wall retaining teeth; 503: Annular recess; 504: First elongated slot; 506: Second shaft hole; 60: Second elastic element; 70: Valve seat; 702: Opening; 704: Flow channel; 72: Cover plate; 80: Locking ring; 802: Engaging groove; 806: Inner wall retaining teeth; A: Axis; A1: First axial direction; A2: Second axial direction; R1: First rotation direction; R2: Second rotation direction; S1: Closed state; S2: Open state.

Figure 1 is a perspective view of an anti-overlapping manual valve according to a preferred embodiment of the present invention. Figure 2 is a top view of the anti-overlapping manual valve according to the preferred embodiment. Figure 3 is a sectional view along line 3-3 of Figure 2. Figure 4 is a sectional view along line 4-4 of Figure 2. Figure 5 is a sectional view of the valve seat of the anti-overlapping manual valve according to the preferred embodiment in the open state. Figure 6 is an exploded schematic diagram of some components of the anti-overlapping manual valve according to the preferred embodiment. Figure 7 is an exploded schematic diagram of some components of the anti-overlapping manual valve according to the preferred embodiment.

10: Rotary knob

102: hook part

104: Central shaft hole

20: Valve stem

202: concave part

204: First paragraph

2041: External thread

206: Second paragraph

208: Third paragraph

208a: First protrusion

20a: End

210: Contact Department

22: Axle

30: Sliding component

302: First shaft hole

302a: Internal thread

304:convex part

40: First elastic component

50: Shell

502: Outer wall stuck teeth

503: Annular recess

504: First long slot hole

506: Second shaft hole

60: Second elastic element

70: Valve Seat

702: Opening

704: Flow channel

80: Locking Ring

802: Engagement slot

103: Card Assembly

806: Inner wall retaining teeth

A: Axis

A1: First axial direction

A2: Second axial direction

R1: First rotation direction

R2: Second rotation direction

S1: Closed state

S2: On status

Claims (9)

An anti-locking manual valve includes: a knob rotatable about an axis; a valve stem having a first section and a second section connected together, the first section having an external thread and the second section not having an external thread; a sliding member having a first shaft hole with an internal thread that mates with the external thread, the sliding member and the knob rotating synchronously; and a first elastic member with its two opposite ends abutting against the knob and the sliding member, respectively. A housing having a second shaft hole through which a valve stem passes, the valve stem being partially disposed within the housing in a manner that allows it to move relative to the housing along the axis but prevents it from rotating relative to the housing about the axis; a second elastic member having its two opposite ends abutting against the inner wall of the housing at the second shaft hole and abutting portion of the valve stem, respectively; and a valve seat having an opening; When the valve seat is in a closed state, the first elastic member provides a first elastic force to push against the sliding member, causing the first shaft hole of the sliding member to contact the first section of the valve stem, and one end of the valve stem to close the opening. At this time, when the knob rotates in a first rotation direction, it can drive the sliding member to rotate in the first rotation direction. When the knob rotates in a second rotation direction, it can drive the sliding member to rotate in the second rotation direction. When the rotation direction is changed, the internal thread of the first shaft hole of the sliding member engages with the external thread of the first section of the valve stem. The sliding member moves along the axis in a first axial direction toward the second section, thereby driving the valve stem to move along the axis in a second axial direction. The end of the valve stem disengages and opens the opening, thus putting the valve seat in an open state. The first rotation direction and the second rotation direction are opposite. Conversely, in the opposite direction of rotation, the first axial direction and the second axial direction are opposite. When the knob continues to rotate in the second rotation direction, the sliding member rotates relative to the valve stem in the second rotation direction, and the first shaft hole of the sliding member moves to the second section, forming free rotation. At this time, the second elastic member provides a second elastic force to push against the valve stem, so that the first shaft hole of the sliding member connects with the first section of the valve stem. When the knob is turned in the first rotation direction, it can drive the sliding member to rotate in the first rotation direction. The internal thread of the first shaft hole of the sliding member is screwed into the external thread of the first section of the valve stem. The sliding member moves along the axis in the second axial direction, thereby driving the valve stem to move along the axis in the first axial direction. The end of the valve stem closes the opening, so that the valve seat is in the closed state. As described in claim 1, the anti-overlock manual valve has an outer diameter of the first segment that is larger than the outer diameter of the second segment. As described in claim 2, the anti-overlock manual valve includes a first segment comprising a first part, a second part, and a third part connected in sequence, the third part being connected to the second segment, the outer diameter of the first part gradually expanding from its end toward the connection with the second part, and the outer diameter of the third part gradually narrowing from the connection with the second part toward the connection between the third part and the second segment. As described in claim 1, the anti-locking manual valve has an opening on each of the two opposite sides of the first shaft hole of the sliding member, and the diameter of each opening gradually decreases from the outside of the first shaft hole inward. As described in claim 1, the anti-overlock manual valve, wherein both the first elastic element and the second elastic element are compression springs. The anti-locking manual valve as described in claim 1, wherein the valve stem has a third section, and the first section, the second section and the third section are connected in sequence. As described in claim 6, the anti-locking manual valve has a first protrusion on the outer peripheral wall of the third segment, and a first elongated slot extending along the axis on the inner wall of the housing. The first protrusion is accommodated in the first elongated slot in a manner that allows it to move along the axis, and the first elongated slot restricts the rotation of the valve stem. As described in claim 1, the anti-locking manual valve has a second protrusion on the outer peripheral wall of the slide member, and the inner wall of the knob has a second elongated slot extending along the axis, wherein the second protrusion is accommodated in the second elongated slot in a manner that allows it to move along the axis. As described in claim 1, the anti-locking manual valve has a protrusion at the top of the sliding member, and a section of the first elastic member is sleeved on the protrusion.