Anti-overlock manual valve

Abstract

An anti-overlock 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 to each other. 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 first shaft hole has an internal thread that mates with the external thread. The sliding member and the knob are rotatable 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 a manner that allows it to move relative to the housing along the axis but cannot rotate relative to the housing about the axis.

Description

Technical Field

[0001] This utility model relates to a manual valve; in particular, it refers to a manual valve with anti-overlock capability. Background Technology

[0002] A manual valve typically consists of 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.

[0003] However, manually operated valves are also prone to damage due to improper operation or different force 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 the manually operated valve to deform or be damaged. Therefore, how to provide a manual valve that can prevent users from overtightening it is an urgent problem to be solved. Summary of the Invention

[0004] In view of this, the purpose of this utility model is to provide an anti-overlock manual valve that can prevent users from over-locking.

[0005] To achieve the above objectives, this utility model provides an anti-lock 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 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, and the valve stem passes through the second shaft hole. A rod is 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. The two opposite ends of the second elastic member abut against the inner wall of the housing at the second shaft hole and abutting portion of the valve rod, respectively. The valve seat has 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 rod and one end of the valve rod to close the opening. At this time, when the knob is rotated in a first rotational direction, it can drive the sliding member to rotate in the first rotational direction. When the knob is rotated in a second rotational direction... When the knob is in motion, it can drive 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 to 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 hole of the sliding member moves to the... In the second stage, free rotation occurs, and 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 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 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.

[0006] The advantage of this invention is that when the valve seat is in the closed state, if the user continuously rotates the knob in the first rotation direction, the knob will enter a free-spinning state and will not drive the valve stem to operate because the internal thread of the sliding member does not engage with the external thread of the valve stem. Furthermore, when the valve seat is in the open state, if the user continuously rotates the knob in the second rotation direction, the knob will enter a free-spinning state and will not drive the valve stem to operate because the sliding member is located in the second section of the valve stem without external threads. Thus, the knob achieves the technical effect of preventing the user from over-tightening it in both rotation directions. Attached Figure Description

[0007] Figure 1 This is a perspective view of a preferred embodiment of the anti-lock manual valve of the present invention.

[0008] Figure 2 This is a top view of the anti-overlock manual valve of the preferred embodiment described above.

[0009] Figure 3 for Figure 2 3-3 sectional view.

[0010] Figure 4 for Figure 2 4-4 sectional view.

[0011] Figure 5 This is a cross-sectional view of the valve seat of the anti-lock manual valve in the above preferred embodiment in the open state.

[0012] Figure 6 This is an exploded view of some components of the anti-overlock manual valve in the preferred embodiment described above.

[0013] Figure 7 This is an exploded view of some components of the anti-overlock manual valve in the preferred embodiment described above.

[0014] Explanation of reference numerals in the attached figures 1: Anti-overlock manual valve 10: Knob 102: hook part 103: Card assembly 104: Central shaft hole 106: Second long slot 20: Valve stem 202: Concave 204: First paragraph 2041: External thread 204a: Part 1 204b: Part Two 204c: Part Three 206: Second paragraph 208: Third paragraph 208a: First protrusion 20a: End 210: Contact Department 22: Shaft 30: Sliding component 302: First shaft hole 302a: Internal thread 302c, 302d: Opening 303: Second protrusion 304: convex part 40: First elastic element 50: Casing 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 72: Cover plate 80: Locking ring 802: Snap-fit ​​slot 806: Inner wall locking teeth A: Axis A1: First axial direction A2: Second axial direction R1: First rotation direction R2: Second rotation direction S1: Closed state S2: On state Detailed Implementation To more clearly illustrate this utility model, preferred embodiments are described in detail below with reference to the accompanying drawings. Please refer to... Figures 1 to 7 As shown, the anti-lock manual valve 1 of this utility model is a preferred embodiment, which includes 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.

[0015] Please cooperate. Figure 5 and Figure 6 One side of the housing 50 is secured to the valve seat 70 by multiple screws, and multiple cover plates 72 are correspondingly provided to cover the screw holes and screws. The opposite side of the housing 50 is connected to the knob 10, as shown below. Figure 4As shown, the bottom of the knob 10 has a hook 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.

[0016] To further explain, such as Figure 4 As shown, 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 on the axis A. In addition, an inner wall tooth 806 is provided at the opening at one end of the locking ring 80, and an outer wall tooth 806 is provided on the outer peripheral wall of the housing 50 that can engage with the inner wall tooth 806. When in use, if the inner wall locking tooth 806 of the locking ring 80 is engaged with the outer wall locking 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 locking tooth 806 of the locking ring 80 can disengage from the outer wall locking tooth 502 of the housing 50, so that the knob 10 can rotate relative to the housing 50, and the locking ring 80 moves together with the locking ring 80.

[0017] like Figure 4 As shown, 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, inside which is an internal thread 302a that mates with the external thread 2041.

[0018] 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 about the axis A.

[0019] To reiterate, if Figure 3As shown, 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. Thus, 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.

[0020] like Figure 4 As shown, 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 section 204 of the valve stem 20 is larger than the outer diameter of the second section 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 section 204 of the valve stem 20 can be screwed into (passed 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 section 206 of the valve stem 20, the valve stem 20 can be stably mounted on the axis A.

[0021] Please cooperate. Figure 4 In this embodiment, both the first elastic element 40 and the second elastic element 60 are compression springs. The two opposite ends of the first elastic element 40 abut against the inner wall of the knob 10 and the top of the sliding element 30, respectively. The top of the sliding element 30 has a protrusion 304, thereby allowing one end of the first elastic element 40 to be fitted onto the protrusion 304 to prevent slippage. The second elastic element 60 is fitted onto the valve stem 20, and the two opposite ends of the second elastic element 60 abut against the inner wall of the housing 50 at the second shaft hole 506 and an abutment portion 210 of the valve stem 20, respectively. The abutment portion 210 is located at the third segment 208 of the valve stem 20 and extends outward from the outer peripheral wall of the valve stem 20.

[0022] Please cooperate. Figure 4 The valve seat 70 has an opening 702 on its upper part, and the opening 702 is connected to a flow channel 704 of the valve seat 70. When the locking ring 80 is pushed up, the valve seat 70... Figure 4As shown in a closed state S1, 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 segment 204 of the valve stem 20 and one end 20a of the valve stem 20 closes the opening 702. At this time, when the knob 10 rotates in a first rotation direction R1 (e.g., clockwise), it can drive the sliding member 30 to rotate synchronously in the first rotation direction R1. However, since the internal thread 302a (e.g., left-hand thread) of the first shaft hole 302 of the sliding member 30 does not engage with the external thread 2041 (e.g., left-hand thread) of the first segment 204 of the valve stem 20, the valve stem 20 will not move relative to the sliding member 30.

[0023] When the knob 10 is rotated 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 segment 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 segment 204 of the valve stem 20. As a result, the sliding member 30 moves along the axis A in a first axial direction A1 toward the second segment 206, while simultaneously driving the valve stem 20 to move along the axis A in a second axial direction A2. The end 20a of the valve stem 20 disengages and opens the opening 702, allowing the valve seat 70 to... Figure 5 The diagram shows an open state S2, wherein 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.

[0024] 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 respect to 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 push of 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... 04 Contact, if the knob 10 rotates in the first rotation direction R1, it can simultaneously 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 engages 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 in both rotation directions. In addition, when the valve seat 70 is as Figure 4 As shown in the closed state S1, the shaft 22 is located in the central shaft hole 104 and is not exposed. When the valve seat 70 is in the closed state S1, the shaft 22 is located in the central shaft hole 104 and is not exposed. Figure 5 As shown in the open state S2, the shaft 22 protrudes from the central shaft hole 104, which helps the user to identify the open and closed state of the valve seat 70.

[0025] Furthermore, the first segment 204 of the valve stem 20 comprises 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 shrinks 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 an opening 302d on opposite sides. The diameter of each opening 302c and an opening 302d gradually shrinks from the outside of the first shaft hole 302 toward the inside.

[0026] In summary, the advantages of this invention are as follows: 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, the knob 10 will enter a free-spinning state and will not drive the valve stem 20 to operate because the internal thread 302a of the sliding member 30 does not engage with the external thread 2041 of the valve stem 20. Furthermore, when the valve seat 70 is in the open state S2, if the user continuously rotates the knob 10 in the second rotation direction R2, the knob 10 will enter a free-spinning state and will not drive the valve stem 20 to operate because the sliding member 30 is located in the second segment 206 of the valve stem 20 which does not have an external thread. Thus, the knob 10 achieves the technical effect of preventing the user from over-tightening it in both rotation directions.

[0027] The above description is only a preferred and feasible embodiment of this utility model. Any equivalent changes made by applying the specification and claims of this utility model should be included within the patent scope of this utility model.

Claims

1. An overlock-preventing manual valve characterized by comprising: Include: A single knob can rotate around a central 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 slider has a first shaft hole, and the first shaft hole has an internal thread that mates with the external thread. The slider and the knob can rotate synchronously. A first elastic element, with its opposite ends respectively abutting against the knob and the sliding element; A housing having a second shaft hole, the valve stem passing through the second shaft hole, the valve stem being 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 about the axis; A second elastic element, with its opposite ends respectively abutting against the inner wall of the housing at the second shaft hole and an abutting portion of the valve stem; as well as A valve seat having an opening; When the valve seat is in a closed state, the first elastic element provides a first elastic force to push against the sliding element, causing the first shaft hole of the sliding element 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 is rotated in a first rotation direction, it can drive the sliding element to rotate in the first rotation direction. When the knob is rotated in a second rotation direction, it can drive the sliding element to rotate in the second rotation direction. The internal thread of the first shaft hole of the sliding element engages with the external thread of the first section of the valve stem. The sliding element 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. The rotation direction is such that the first axial direction and the second axial direction are opposite. When the knob is continuously rotated 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 segment to form free rotation. At this time, the second elastic member provides a second elastic force to push the valve stem, so that the first shaft hole of the sliding member contacts the first segment of the valve stem. When the knob is rotated 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 segment 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.

2. The anti-overlock manual valve as described in claim 1, wherein, The outer diameter of the first segment is larger than the outer diameter of the second segment.

3. The anti-overlock manual valve as described in claim 2, wherein, The first segment comprises a first part, a second part, and a third part connected in sequence. The third part is connected to the second segment. The outer diameter of the first part gradually expands from its end toward the point where it connects with the second part. The outer diameter of the third part gradually shrinks from the point where it connects with the second part toward the point where it connects with the second segment.

4. The anti-overlock manual valve as described in claim 1, wherein, The first shaft hole of the slider has an opening on each of the opposite sides, and the diameter of the opening gradually decreases from the outside of the first shaft hole to the inside.

5. The anti-overlock manual valve as described in claim 1, wherein, Both the first elastic element and the second elastic element are compression springs.

6. The anti-overlock 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.

7. The anti-overlock manual valve as described in claim 6, wherein, The outer peripheral wall of the third segment has a first protrusion, and the inner wall of the housing has a first elongated slot extending along the axis. 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.

8. The anti-overlock manual valve as described in claim 1, wherein, The outer peripheral wall of the slider has a second protrusion, and the inner wall of the knob has a second elongated slot extending along the axis. The second protrusion is accommodated in the second elongated slot in a manner that allows it to move along the axis.

9. The anti-overlock manual valve as described in claim 1, wherein, The top of the slider has a protrusion, and a section of the first elastic member is sleeved on the protrusion.

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