Manual valve switch position indicating device and manual valve

Abstract

The invention relates to a manual valve switch position indicating device and a manual valve, and belongs to the technical field of valves. The indicating device comprises a valve rod protective cover, a valve rod protective cover mounting seat and a permanent magnet, wherein the valve rod protective cover mounting seat is fixedly mounted on a shaft sleeve for driving a valve rod to rotate when the opening degree of the manual valve is adjusted; the permanent magnet is fixedly mounted on the valve rod; the valve rod shield mounting seat comprises a bearing mounting seat sleeved on the shaft sleeve and a rolling bearing sleeved on the bearing mounting seat, and an inner ring of the rolling bearing is in interference fit with the bearing mounting seat; the valve rod shield is provided with a magnetic turning plate display capable of indicating the stroke position of the valve rod by being coupled with the permanent magnet, and the valve rod shield is fixedly installed on the outer ring of the rolling bearing. According to the device, when the hand wheel is rotated to open and close the manual valve, the magnetic flap display displays the preset state according to the position of the valve rod, so that the opening degree of the manual valve is displayed, and an operator can conveniently and visually observe the opening and closing state of the manual valve to avoid misoperation.

Description

Technical Field

[0001] The invention relates to a manual valve switch position indicating device and a manual valve, belonging to the technical field of valves. Background Art

[0002] Existing manual valves use a handwheel to drive the valve stem to achieve valve opening and closing operations. To prevent unnecessary losses caused by human error, a protective cover is generally installed on the valve handwheel. After the valve is opened and closed, it is necessary to rely on the observation hole of the protective cover on the outside of the valve stem to judge the valve opening and closing position and the degree of opening and closing. For example, Chinese utility model patent with authorization announcement number CN206175801U discloses a valve opening and closing position observation structure, which includes a valve stem, a transition bracket, a dynamic limit block, a coupling sleeve, and a static limit block that limits the angular travel of the dynamic limit block. The free end of the valve stem extends into the transition bracket, one end of the coupling sleeve is sleeved on the free end of the valve stem and is statically connected to the valve stem, and the other end of the coupling sleeve extends out of the transition bracket. The dynamic limit block is fixedly mounted on the outer wall of the coupling sleeve; the static limit block is mounted on the transition bracket, located between the coupling sleeve and the transition bracket, and the side wall of the transition bracket has two observation holes, which respectively adapt to the two limit points of the static limit block. In good light, the observation hole allows for intuitive observation of valve full opening, but in low light conditions, this is difficult to discern. Furthermore, with the increasing diversity of valve types, in addition to the commonly used forward valve, reverse valves are becoming increasingly common. When these two types of valves are mixed on-site, operators cannot intuitively determine the valve's open or closed position based on the exposed length of the valve stem. Summary of the Invention

[0003] The object of the present invention is to provide a manual valve switch position indicating device, which can enable an operator to observe the switch position status of the manual valve intuitively and accurately.

[0004] The present invention also provides a manual valve that allows an operator to intuitively and accurately observe the switch position of the manual valve.

[0005] In order to achieve the above objectives, the technical solution adopted by the manual valve switch position indicating device of the present invention is:

[0006] A manual valve switch position indicating device comprises a valve stem guard, a valve stem guard mounting seat for being fixedly mounted on a shaft sleeve for driving the valve stem to rotate when adjusting the opening of the manual valve, and a permanent magnet for being fixedly mounted on the valve stem; the valve stem guard mounting seat comprises a bearing mounting seat for being sleeved on the shaft sleeve and a rolling bearing sleeved on the bearing mounting seat, the inner ring of the rolling bearing being interference fit with the bearing mounting seat; a magnetic flap display is provided on the valve stem guard that can indicate the valve stem stroke position by coupling with the permanent magnet, and the valve stem guard is fixedly mounted on the outer ring of the rolling bearing.

[0007] Furthermore, the manual valve switch position indicating device also includes a rotation-stopping fitting structure for preventing the valve stem guard from rotating along with the inner ring of the rolling bearing when the inner ring of the rolling bearing rotates.

[0008] Furthermore, the anti-rotation fitting structure includes a keyway provided on the inner wall of the valve stem shield and an anti-rotation disc fixedly mounted on the valve stem and slidingly fitted with the keyway, and the keyway extends in a direction parallel to the valve stem.

[0009] Furthermore, a load-bearing step is provided at the lower end of the valve stem guard, the lower end face of the load-bearing step abuts against the upper end of the outer ring of the rolling bearing, a screw hole is provided on the valve stem guard, and the valve stem guard and the outer ring of the rolling bearing are connected by screws passing through the screw hole.

[0010] Furthermore, the magnetic flip display includes a magnetic flip column mounting frame and a plurality of magnetic flip columns mounted on the magnetic flip column mounting frame; the magnetic flip columns are marked with a first state mark and a second state mark, and the magnetic flip columns are evenly spaced in the axial direction of the valve stem.

[0011] Furthermore, the magnetic flip column includes a column and a rotating shaft, and the column is formed by splicing a semi-cylindrical magnetized float and a semi-cylindrical rubber; the semi-cylindrical magnetized float is marked with a first state mark, and the semi-cylindrical rubber is marked with a first state mark.

[0012] Furthermore, the rolling bearing is equipped with a locking piece, and the locking piece is threadedly connected to the bearing mounting seat.

[0013] The manual valve switch position indicating device of the present invention is a new indicating device. When the opening of the manual valve is adjusted, the magnetic flap display shows the preset state according to the position of the valve stem, thereby showing the opening of the manual valve, making it convenient for the operator to intuitively observe the switch state of the manual valve to avoid misoperation.

[0014] The technical solution adopted by the manual valve of the present invention is:

[0015] A manual valve includes a valve stem, a shaft sleeve for driving the valve stem to rotate when adjusting the opening of the manual valve, and a handwheel fixedly connected to the shaft sleeve. The manual valve also includes the above-mentioned manual valve switch indicator device, and the valve stem guard mounting seat in the manual valve switch indicator is fixedly installed on the shaft sleeve.

[0016] Furthermore, the permanent magnet is installed at the end of the valve stem.

[0017] Furthermore, the handwheel is mounted on the shaft sleeve and locked by a bearing mounting seat.

[0018] The manual valve of the present invention, when the hand wheel is turned to adjust the opening of the manual valve, the magnetic flap display shows a preset state according to the position of the valve stem, thereby showing the opening of the manual valve, which is convenient for the operator to intuitively observe the switching state of the manual valve to avoid misoperation. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 Schematic diagram of a manual valve switch position indicating device according to embodiment 1 of the present invention;

[0020] Figure 2 This is a schematic diagram of the full cross-section structure of the protective cover in the manual valve switch position indicating device according to Example 1 of the present invention;

[0021] Figure 3 for Figure 2 Middle AA view;

[0022] Figure 4 for Figure 2 Middle BB view;

[0023] Figure 5 Schematic diagram of the structure of the annular weak magnetic plate in the manual valve switch position indicating device of Example 1 of the present invention;

[0024] Figure 6 Schematic diagram of the structure of the cross plate in the manual valve switch position indicating device of Example 1 of the present invention;

[0025] Figure 7 Schematic diagram of the structure of the hexagonal spare cap in the manual valve switch position indicating device of Example 1 of the present invention;

[0026] Figure 8 Schematic diagram of the structure of the bearing mounting seat in the manual valve switch position indicating device of Example 1 of the present invention;

[0027] Figure 9 1 is a top view of a bearing mounting seat in a manual valve switch position indicating device according to embodiment 1 of the present invention;

[0028] Figure 10 Schematic diagram of the structure of the magnetic flip column in the manual valve switch position indicating device of Example 1 of the present invention;

[0029] Figure 11 A top view of the hand wheel in Example 1 of the present invention;

[0030] Figure 12 Schematic diagram of the matching structure of the valve stem and the shaft sleeve when the switch position indicating device in Example 1 of the present invention is installed in a manual valve;

[0031] Figure 13 A top view of the valve stem and sleeve of the switch position indicating device of Example 1 of the present invention when installed in a manual valve;

[0032] Figure 14 Schematic diagram of a manual valve according to embodiment 3 of the present invention;

[0033] Figure 15 Schematic diagram of a manual valve according to embodiment 4 of the present invention;

[0034] Among them: 1-valve stem guard, 101-keyway, 102-load-bearing step, 105-core screw hole, 104-hexagonal screw, 2-locking screw, 201-spring washer, 202-flat washer, 203-annular weak magnetic plate, 204-cross anti-rotation disk, 205-insert key; 3-magnetic flip display, 301-magnetic flip column, 302-semi-cylindrical magnetized float, 303-semi-cylindrical rubber, 304-rotating shaft, 305- Magnetic flip column mounting bracket; 4-hexagonal spare cap, 401-internal thread of hexagonal spare cap, 402-bearing mounting seat, 403-rolling bearing, 404-center mounting through hole, 405-bearing mounting column, 406-rolling bearing matching surface, 407-hexagonal base, 408-internal thread of bearing mounting seat; 5-handwheel, 501-inner sleeve of handwheel; 6-valve stem, 601-screw hole, 602-sleeve, 603-external thread of sleeve. DETAILED DESCRIPTION

[0035] The technical solution of the present invention is further described below in conjunction with specific implementation methods.

[0036] Example 1

[0037] The manual valve switch position indicating device of this embodiment is as follows: Figures 1 to 13 As shown, it includes a valve stem guard 1, a valve stem guard mounting seat for being fixedly mounted on a shaft sleeve 602, a cross anti-rotation disc 204 and an annular weak magnetic plate 203 for being fixedly mounted on the upper end of the valve stem, and the shaft sleeve 602 is used to drive the valve stem 6 to rotate and move axially when adjusting the opening of the manual valve.

[0038] The valve stem guard mounting seat includes a bearing mounting seat 402 and a rolling bearing 403 mounted on the bearing mounting seat. The bearing mounting seat 402 includes a bearing mounting column 405 and a hexagonal base 407. The bearing mounting column 405 and the hexagonal base 407 are integrated. The size of the hexagonal base 407 is larger than the diameter of the inner ring of the rolling bearing 403. The rolling bearing 403 is sleeved on the bearing mounting column 405. The rolling bearing 403 and the bearing mounting column 405 of the bearing mounting seat 402 are interference fit. The mating surface 406 is located at the bearing mounting column 405. In the middle of the mounting column 405, there is a gap between the lower end of the outer ring of the rolling bearing 403 and the upper end surface of the hexagonal base 407, so that the outer ring of the rolling bearing 403 does not generate friction with the hexagonal base 407 when it rotates; the bearing mounting seat 402 is provided with a central mounting through hole 404 that passes through the bearing mounting seat 402 and the hexagonal base 407, and the entire inner wall of the central mounting through hole 404 is provided with an internal thread 408 of the bearing mounting seat, and the bearing mounting seat 403 is threadedly connected to the shaft sleeve 602 through the internal thread 408 of the bearing mounting seat.

[0039] The bearing mounting seat 402 is provided with an external thread above the mating surface that has an interference fit with the bearing mounting post 405. The bearing mounting post is provided with a hexagonal cap 4. The hexagonal cap 4 is provided with a central through hole, and the entire central through hole is provided with the internal thread 401 of the hexagonal cap. The hexagonal cap 4 is threadedly connected to the bearing mounting seat 402 through the central through hole. The bottom of the hexagonal cap 4 is tightly against the inner ring of the rolling bearing 403 to prevent the rolling bearing from dislodging from the bearing mounting seat 402, thereby fixing and limiting the bearing. The shape of the hexagonal cap 4 also facilitates the use of a wrench to loosen the thread. In other embodiments of the present invention, the hexagonal cap can also be omitted.

[0040] The lower end of the stem shield 1 has four through-hole screw holes 103 evenly distributed circumferentially. The stem shield 1 is mounted on the outer ring of the rolling bearing 403 and is fixedly connected to the outer ring of the rolling bearing 403 via four hexagonal screws 104 passing through the through-hole screw holes 103, allowing the shaft sleeve 602 to rotate with the outer ring of the rolling bearing 403. The inner wall of the stem shield 1 is provided with an annular load-bearing step 102. The load-bearing step 102 is located above the through-hole screw holes 103, and the lower end surface of the load-bearing step 102 abuts the upper end of the outer ring of the rolling bearing 403. In other embodiments of the present invention, the load-bearing step 102 can also be omitted. Four key slots 101 extending in the vertical direction are evenly distributed on the inner wall of the stem shield 1.

[0041] The annular weak magnetic plate 203 is a permanent magnet machined from magnets. The cross-shaped anti-rotation disc 204 and the annular weak magnetic plate 203 are both provided with locking screw holes at their centers. Four protruding keys 205 are evenly distributed circumferentially on the cross-shaped anti-rotation disc 204. These keys 205 slide in keyways 101 on the inner wall of the valve stem shield 1. As the manual valve is adjusted between maximum and minimum openings, the cross-shaped anti-rotation disc moves with the valve stem, allowing the keys to slide within their corresponding keyways. During this process, the cross-shaped anti-rotation disc 204 and keyways 101 act as a rotation-stopping mechanism, preventing the valve stem shield 1 from rotating relative to the inner ring of the rolling bearing 402.

[0042] A magnetic flap indicator 3 is mounted outside the valve stem shield 1. The indicator comprises a magnetic flap mounting bracket 305 and multiple magnetic flaps 301 evenly spaced vertically on the bracket. Each flap 301 comprises a cylindrical body and a rotation axis 304 arranged along the centerline of the body. The rotation axis 304 of each flap 301 is horizontally arranged, allowing each flap 301 to rotate freely about the centerline of the body. The body is formed by a semi-cylindrical magnetic float 302 and a semi-cylindrical rubber member 303. The two semi-cylinders of the body are painted green and red, respectively, as markings. When the manual valve is adjusted from minimum to maximum opening, the color of the flaps 301 on the magnetic flap indicator 3 changes from red to green. The percentage of green flaps 301 displayed relative to the total number of flaps 301 on the magnetic flap indicator 3 indicates the valve opening. The manual valve switch position indicating device of this embodiment is applicable to a forward valve, and the magnetic flip column of the magnetic flap indicator 3 gradually flips from red to green as the valve stem moves upward.

[0043] When the manual valve switch position indicating device of this embodiment is in use, a screw hole 601 for installing a locking screw 2 is machined on the upper end of the valve stem of the manual valve by tapping, and then the locking screw 2, spring washer 201 and flat washer 202 are used to fix the cross anti-rotation disk 204 and the annular weak magnetic plate 203 on the upper end of the valve stem 6 in order from top to bottom, and the spring washer 201 is set above the flat washer 202, and then the bearing mounting seat 402 is installed on the shaft sleeve 602 with an external thread 603, and the bearing mounting seat 402 is threadedly connected to the shaft sleeve 602 through the central mounting through hole 404, and the handwheel 5 which is sleeved on the shaft sleeve 602 below is fixed and limited by the hexagonal base 407 to prevent the handwheel 5 from falling out, and then the rolling bearing 403 and the hexagonal spare cap 4 are installed on the bearing mounting seat 402, and then the valve stem shaft sleeve 1 with the magnetic flap display 3 is installed on the outer ring of the rolling bearing 403; wherein, the handwheel 5 is as shown in FIG. Figure 11As shown, the central mounting hole is fixedly mounted with a handwheel inner sleeve 501, which is provided with an internal thread. The handwheel 5 is threadedly connected to the shaft sleeve 602 through the inner sleeve 501, so that when the handwheel 5 rotates, it can drive the shaft sleeve 602 to rotate. In addition, the hexagonal base 407 of the bearing mounting seat 402 is also used for loosening the thread with a wrench.

[0044] like Figure 1 As shown, when the hand wheel 5 is rotated to adjust the opening of the manual valve, the hand wheel 5 transmits torque to the shaft sleeve 602, thereby driving the shaft sleeve 602 to rotate. The rotation of the shaft sleeve 602 will force the valve stem 6 to move longitudinally, thereby adjusting the opening of the manual valve.

[0045] During the above process, as the sleeve 602 rotates, the bearing mount 402 mounted on the sleeve 602 also rotates, driving the inner ring of the rolling bearing 403 to rotate. The four keys 205 of the cross-shaped anti-rotation disk 204 move longitudinally along the four longitudinal keyways 101 within the valve stem shield 1, thereby limiting the valve stem shield 1 from rotating with the outer ring of the rolling bearing 403, achieving internal and external rotation separation. As the valve stem 6 moves longitudinally, the annular weak magnetic plate 203 at its top moves longitudinally, thereby approaching the magnetic column 301 within the corresponding position of the magnetic flap indicator 3. Through the adsorption force of the semi-cylindrical magnetized float 302, it displays its relative longitudinal position to the valve stem 6, thereby displaying the valve's open / close state. The magnetic flap indicator 3 is fixed to the outside of the valve stem shield 1 with a cable tie.

[0046] Example 2

[0047] The manual valve switch position indicating device of this embodiment is suitable for a reverse valve. The only difference from the manual valve switch position indicating device of Example 1 is that the magnetic flip column of the magnetic flip plate display 3 of this embodiment gradually flips from red to green as the valve stem descends.

[0048] Example 3

[0049] The manual valve of this embodiment is a forward valve. Figure 14 As shown, it includes a handwheel 5, a valve stem, a sleeve for driving the valve stem to rotate when adjusting the valve opening, a valve core (not shown in the figure), a valve body and a manual valve switch position indicating device of Example 1; wherein the sleeve is provided with an external thread, the central mounting hole of the handwheel is fixedly mounted with a handwheel inner sleeve, the handwheel inner sleeve is provided with an internal thread, and the handwheel is threadedly connected to the sleeve through the inner sleeve;

[0050] The valve stem guard 1 mounting seat of the manual valve switch position indicating device is fixedly installed on the shaft sleeve, and the bearing mounting seat is sleeved on the shaft sleeve and plays a locking role on the hand wheel; a screw hole is provided on the upper end of the valve stem, and the cross anti-rotation plate and the annular weak magnetic plate are fixed to the upper end of the valve stem by locking screws, spring washers and flat washers in order from top to bottom, and the spring washers are arranged above the flat washers.

[0051] When the gate is opened, the magnetic flip column in the magnetic flap display 3 of the manual valve switch position indicating device gradually flips over as the valve stem moves upward, indicating the valve stem position and thus reflecting the gate opening position.

[0052] Example 4

[0053] The manual valve of this embodiment is a reverse valve. Figure 15 As shown, it includes a handwheel 5, a valve stem, a sleeve for driving the valve stem to rotate when adjusting the valve opening, a valve core (not shown in the figure), a valve body and a manual valve switch position indicating device of Example 2; wherein the sleeve is provided with an external thread, the central mounting hole of the handwheel is fixedly mounted with a handwheel inner sleeve, the handwheel inner sleeve is provided with an internal thread, and the handwheel is threadedly connected to the sleeve through the inner sleeve;

[0054] The valve stem guard 1 mounting seat of the manual valve switch position indicating device is fixedly installed on the shaft sleeve, and the bearing mounting seat is sleeved on the shaft sleeve and plays a locking role on the hand wheel; a screw hole is provided on the upper end of the valve stem, and the cross anti-rotation plate and the annular weak magnetic plate are fixed to the upper end of the valve stem by locking screws, spring washers and flat washers in order from top to bottom, and the spring washers are arranged above the flat washers.

[0055] When the gate is opened, the magnetic flip column of the magnetic flap display 3 of the manual valve switch position indicating device gradually turns over as the valve stem moves downward, indicating the valve stem position and thus reflecting the gate opening position.

Claims

1. A manual valve switch position indicating device, characterized in that: It includes a valve stem guard, a valve stem guard mounting seat for being fixedly mounted on a shaft sleeve for driving the valve stem to rotate when adjusting the opening of a manual valve, and a permanent magnet for being fixedly mounted on the valve stem; the valve stem guard mounting seat includes a bearing mounting seat for being sleeved on the shaft sleeve and a rolling bearing sleeved on the bearing mounting seat, and the inner ring of the rolling bearing is interference fit with the bearing mounting seat; the valve stem guard is provided with a magnetic flap display that can indicate the valve stem stroke position by coupling with the permanent magnet, and the valve stem guard is fixedly mounted on the outer ring of the rolling bearing.

2. The manual valve switch position indicating device according to claim 1, characterized in that: The manual valve switch position indicating device further comprises a rotation-stopping fitting structure for preventing the valve stem guard from rotating along with the inner ring of the rolling bearing when the inner ring of the rolling bearing rotates.

3. The manual valve switch position indicating device according to claim 2, characterized in that: The anti-rotation matching structure includes a key groove arranged on the inner wall of the valve stem shield and an anti-rotation disk fixedly installed on the valve stem and slidingly matched with the key groove. The key groove extends in a direction parallel to the valve stem.

4. The manual valve switch position indicating device according to claim 1, characterized in that: A load-bearing step is provided at the lower end of the valve stem guard, and the lower end surface of the load-bearing step abuts against the upper end of the outer ring of the rolling bearing. A screw hole is provided on the valve stem guard, and the valve stem guard and the outer ring of the rolling bearing are connected by screws passing through the screw hole.

5. The manual valve switch position indicating device according to claim 1, characterized in that: The magnetic flip display includes a magnetic flip column mounting frame and a plurality of magnetic flip columns mounted on the magnetic flip column mounting frame; the magnetic flip columns are marked with a first state mark and a second state mark, and the magnetic flip columns are evenly spaced in the axial direction of the valve stem.

6. The manual valve switch position indicating device according to claim 5, characterized in that: The magnetic flip column includes a column and a rotating shaft. The column is formed by splicing a semi-cylindrical magnetized float and a semi-cylindrical rubber. The semi-cylindrical magnetized float is marked with a first state mark, and the semi-cylindrical rubber is marked with a first state mark.

7. The manual valve switch position indicating device according to claim 1, characterized in that: The rolling bearing is equipped with a locking piece, and the locking piece is threadedly connected to the bearing mounting seat.

8. A manual valve comprising a valve stem, a sleeve for driving the valve stem to rotate when adjusting the opening of the manual valve, and a handwheel fixedly connected to the sleeve, characterized in that: The manual valve further comprises a manual valve switch position indicating device as claimed in claims 1 to 7, wherein the valve stem guard mounting seat in the manual valve switch indicator is fixedly mounted on the shaft sleeve.

9. The manual valve according to claim 8, characterized in that: The permanent magnet is mounted on the end of the valve stem.

10. The manual valve according to claim 8 or 9, characterized in that: The hand wheel is mounted on the shaft sleeve and locked by the bearing mounting seat.

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