Anti-loosening sealing diaphragm valve

Abstract

The utility model discloses an anti-loosening sealing diaphragm valve which comprises a valve body, a valve cover, an actuator, a valve cavity, a valve rod, a flow channel, a valve clack and a diaphragm. An inner shell is arranged in the valve cavity, an inner sliding block which is limited in the inner shell and slides in the horizontal direction is arranged in the inner shell, an embedded block is fixedly arranged at the left end of the inner sliding block, an embedded groove is formed in the right end of the valve rod, and when the flow channel is cut off by the valve clack, the embedded groove is just located on the left side of the embedded block. A driving spring for providing driving force for the embedded block to be embedded into the embedded groove is arranged in the inner shell; and an inclined guide contact surface is arranged on the embedded block. The utility model has the following advantages and effects: the inner sliding block can keep moving leftwards under the driving force of the driving spring, and then can push the embedded block to be embedded into the embedded groove of the valve rod, so as to lock the valve rod; longitudinal reciprocating offset of the valve rod is avoided, and the sealing performance of the valve clack is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of valves, in particular to an anti-loosening sealing diaphragm valve. Background Art

[0002] Valves are pipe accessories used to open and close pipes, control flow direction, and adjust and control the parameters (temperature, pressure, and flow) of the conveying medium. According to their functions, they can be divided into shut-off valves, check valves, regulating valves, etc. Diaphragm valves are one of the common valves. Under long-term use conditions, the cooperation between the actuator and the valve stem of existing diaphragm valves will fatigue, causing the valve stem to frequently reciprocate longitudinally; at the same time, when the valve body is hit by external impact, it is also easy to cause the longitudinal offset of the valve stem, thereby affecting the sealing of the valve disc and causing leakage. Utility Model Content

[0003] The utility model aims to provide an anti-loosening sealing diaphragm valve to solve the problems raised in the background technology.

[0004] The above technical objectives of the utility model are achieved through the following technical solutions:

[0005] An anti-loosening sealing diaphragm valve comprises a valve body, a valve cover is fixedly arranged on the upper end of the valve body, an actuator is fixedly arranged on the upper end of the valve cover, a valve cavity is formed by cooperation between the valve body and the valve cover, a valve stem extending downward into the valve cavity is arranged in the actuator, a flow channel for a fluid medium to pass through is opened in the valve body, a valve disc is fixedly arranged on the lower end of the valve stem and extends into the flow channel and can cut off the flow channel, and a diaphragm is arranged on the valve disc and the inner wall of the flow channel;

[0006] An inner shell is fixedly arranged in the valve cavity, an inner slider is arranged in the inner shell and is limited to slide horizontally in the inner shell, an inner block is fixedly arranged at the left end of the inner slider, an inner groove is arranged at the right end of the valve stem, and when the valve flap cuts off the flow channel, the inner groove is just located on the left side of the inner block, and a driving spring is arranged in the inner shell to provide a driving force for the inner block to be embedded in the inner groove;

[0007] The embedded block is provided with an inclined guiding contact surface.

[0008] A further configuration is as follows: an opening is provided on the left side of the inner shell for the embedded block to extend out, the embedded block is composed of a pushing section and a contact section, the cross-sectional shape of the pushing section is a square, and the right end of the pushing section is in contact with the driving spring; the cross-sectional shape of the contact section is a right-angled triangle, one right-angled side of the contact section is fixed to the left end of the pushing section, the other right-angled side is parallel to the lower end face of the pushing section, and the hypotenuse is the guide contact surface; the contact section is adapted to the embedded groove.

[0009] Further configuration is: an inner filling block is fixedly arranged in the inner shell, the inner shell and the right side of the inner filling block are both in contact with the valve cavity wall, and the driving spring is extruded and arranged between the pushing section and the inner filling block; a horizontal limiting guide hole is opened inside the inner filling block, and the right end of the inner sliding block extends into and is limited in the limiting guide hole to maintain the horizontal movement of the embedded block.

[0010] A further configuration is that a horizontal through hole is opened in the valve cover, the right end of the inner slider passes through the through hole and extends out of the valve cover, and a force cover is fixedly provided on the right end of the inner slider by threads, and the user pulls the force cover to the right to drive the contact section out of the embedded groove.

[0011] A further configuration is that: the cross-sectional height of the force-applying cover is greater than the aperture of the through hole, and the inner slider and the inner embedded block are limited by the abutment between the force-applying cover and the outer side wall of the valve cover;

[0012] A first limiting section is fixedly provided at the right end of the pushing section, and a second limiting section is fixedly provided at the left end of the inner filling block. Both the first limiting section and the second limiting section extend into the driving spring, and the inner sliding block and the inner embedded block are limited by the mutual abutment between the first limiting section and the second limiting section.

[0013] A further configuration is that a rubber pad is fixedly provided on the left end portion of the force applying cover.

[0014] A further configuration is that a positioning protrusion with a semicircular cross-section is fixedly provided on the upper end of the inner shell, and a positioning recess for the positioning protrusion to extend into is provided on the wall of the valve cavity.

[0015] A further configuration is that an extension section is fixedly provided at the lower end of the inner shell, and the extension section is fixed to the valve cover by a horizontal first screw; and the inner filling block, the inner shell and the valve cover are fixed by a vertical second screw.

[0016] A further configuration is that a support block capable of supporting the embedded block is fixedly arranged at the left end portion of the inner shell.

[0017] The beneficial effects of the utility model are:

[0018] 1. In the utility model, an inner shell is fixed in the valve cavity, and the inner slider in the inner shell will keep moving to the left under the driving force of the driving spring, and then can push the embedded block to be embedded in the embedded groove of the valve stem, thereby locking the valve stem; avoiding the longitudinal reciprocating deviation of the valve stem and improving the sealing of the valve disc; the guide contact surface arranged on the embedded block can improve the smoothness of the movement of the valve stem. When the embedded block is not embedded in the embedded groove, the embedded block and the valve stem are in point-to-surface contact, which reduces the friction resistance as much as possible and makes the valve stem move more smoothly.

[0019] 2. In the present invention, the right end of the inner slide extends into and is limited in the limiting guide hole, which can play a limiting role, allowing the embedded block to maintain horizontal movement and avoid falling downward.

[0020] 3. In the utility model, the through hole in the valve cover is used for the right end of the inner slider to pass through. The right end of the inner slider can extend outside the valve cover and is fixed with a force cover. The user can pull the force cover to the right by applying force with his hands, thereby driving the contact section to disengage from the embedded groove to release the lock on the valve stem.

[0021] 4. In the present invention, the double-end limiting of the inner slider and the inner embedded block is achieved by the force cover abutting against the outer side wall of the valve cover, and the first limiting section abutting against the second limiting section.

[0022] 5. In the present invention, the rubber pad can play a buffering role, thereby protecting the force application cover.

[0023] 6. The arrangement of the positioning protrusion and the positioning recess in the utility model can facilitate the positioning of the inner shell, allowing the first screw and the second screw to be quickly aligned and screwed in.

[0024] 7. In the present invention, the support block can play a role in supporting the embedded block. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] Figure 1 It is a structural schematic diagram of an embodiment;

[0026] Figure 2 for Figure 1 Enlarged view of part A in the middle.

[0027] In the figure: 11, valve body; 12, valve cover; 13, actuator; 14, valve chamber; 15, valve stem; 151, embedded groove; 16, flow channel; 17, valve disc; 18, diaphragm; 21, inner shell; 22, inner slider; 23, drive spring; 31, push section; 32, contact section; 321, guide contact surface; 41, inner filling block; 411, limiting guide hole; 51, through hole; 52, force cover; 53, rubber pad; 61, first limiting section; 62, second limiting section; 71, positioning protrusion; 72, positioning depression; 81, extension section; 82, first screw; 83, second screw; 91, support block. DETAILED DESCRIPTION

[0028] The utility model is further described in detail below in conjunction with the accompanying drawings.

[0029] As attached Figure 1 and 2 As shown;

[0030] This embodiment discloses an anti-loosening sealing diaphragm valve, including a valve body 11, a valve cover 12 is fixedly provided on the upper end of the valve body 11, an actuator 13 is fixedly provided on the upper end of the valve cover 12, the valve body 11 and the valve cover 12 cooperate to form a valve cavity 14, a valve stem 15 extending downward into the valve cavity 14 is provided in the actuator 13, a flow channel 16 for fluid medium to pass through is provided in the valve body 11, a valve flap 17 extending into the flow channel 16 and capable of cutting off the flow channel 16 is fixedly provided at the lower end of the valve stem 15, and a diaphragm 18 is provided on the valve flap 17 and the inner wall of the flow channel 16. The above is a conventional structure of a diaphragm valve and belongs to the prior art.

[0031] An inner shell 21 is fixedly arranged in the valve cavity 14, and an inner slider 22 is arranged in the inner shell 21 to slide horizontally in the inner shell 21 with a limited position. An embedded block is fixedly arranged at the left end of the inner slider 22, and an embedded groove 151 is opened at the right end of the valve stem 15. When the valve disc 17 cuts off the flow channel 16, the embedded groove 151 is just located on the left side of the embedded block. A driving spring 23 is arranged in the inner shell 21 to provide a driving force for the embedded block to be embedded in the embedded groove 151.

[0032] An inclined guide contact surface 321 is provided on the embedded block.

[0033] Among them, an opening is opened on the left side of the inner shell 21 for the embedded block to extend out, and the embedded block is composed of a pushing section 31 and a contact section 32. The cross-sectional shape of the pushing section 31 is a square, and the right end of the pushing section 31 is in contact with the driving spring 23; the cross-sectional shape of the contact section 32 is a right-angled triangle, and one right-angled side of the contact section 32 is fixed to the left end of the pushing section 31, the other right-angled side is parallel to the lower end face of the pushing section 31, and the hypotenuse is the guide contact surface 321; the contact section 32 is adapted to the embedded groove 151.

[0034] Among them, an inner filling block 41 is fixedly arranged in the inner shell 21, the inner shell 21 and the right side of the inner filling block 41 are both in contact with the wall of the valve chamber 14, and the driving spring 23 is squeezed and arranged between the pushing section 31 and the inner filling block 41; a horizontal limiting guide hole 411 is opened inside the inner filling block 41, and the right end of the inner slider 22 extends into and is limited in the limiting guide hole 411 to maintain the horizontal movement of the embedded block.

[0035] Among them, a horizontal through hole 51 is opened in the valve cover 12, and the right end of the inner slider 22 passes through the through hole 51 and extends out of the valve cover 12. The right end of the inner slider 22 is fixed with a force cover 52 by threads. The user pulls the force cover 52 to the right to drive the contact section 32 out of the embedded groove 151.

[0036] The cross-sectional height of the force-applying cover 52 is greater than the aperture of the through hole 51, and the inner slider 22 and the inner embedded block are limited by the force-applying cover 52 and the outer wall of the valve cover 12 abutting against each other;

[0037] A first limiting section 61 is fixedly provided at the right end of the pushing section 31, and a second limiting section 62 is fixedly provided at the left end of the inner filling block 41. Both the first limiting section 61 and the second limiting section 62 extend into the driving spring 23, and the inner sliding block 22 and the inner embedded block are limited by the mutual abutment between the first limiting section 61 and the second limiting section 62.

[0038] A rubber pad 53 is fixedly disposed on the left end of the force applying cover 52 .

[0039] A positioning protrusion 71 with a semicircular cross-section is fixedly provided on the upper end of the inner shell 21 , and a positioning recess 72 for the positioning protrusion 71 to extend into is formed on the wall of the valve cavity 14 .

[0040] An extension section 81 is fixedly provided at the lower end of the inner shell 21 , and the extension section 81 is fixed to the valve cover 12 via a horizontal first screw 82 ; the inner filling block 41 , the inner shell 21 and the valve cover 12 are fixed via a vertical second screw 83 .

[0041] A support block 91 capable of supporting the embedded block is fixedly disposed at the left end of the inner shell 21 .

[0042] The working principle of this embodiment is:

[0043] ① When the contact section 32 is not embedded in the embedded groove 151, the contact section 32 and the valve stem 15 are in point-to-surface contact, which reduces the friction resistance as much as possible, and the valve stem 15 moves more smoothly.

[0044] ② When the valve disc 17 cuts off the flow channel 16, the embedded groove 151 is located exactly on the left side of the embedded block. The embedded block will move leftward under the driving force of the driving spring 23, so that the contact section 32 is embedded in the embedded groove 151, thereby locking the valve stem 15.

[0045] ③ When the valve stem 15 needs to be unlocked, the force-applying cover 52 is held by hand and pulled to the right to drive the contact section 32 out of the embedded groove 151, which is very convenient.

[0046] This specific embodiment is merely an explanation of the present invention and is not a limitation of the present invention. After reading this specification, those skilled in the art may make non-creative modifications to the present embodiment as needed, but such modifications are protected by patent law as long as they are within the scope of the claims of the present invention.

Claims

1. An anti-loosening sealing diaphragm valve, comprising a valve body (11), a valve cover (12) fixedly arranged on the upper end of the valve body (11), an actuator (13) fixedly arranged on the upper end of the valve cover (12), the valve body (11) and the valve cover (12) cooperate to form a valve cavity (14) inside, a valve stem (15) extending downward into the valve cavity (14) is arranged in the actuator (13), a flow channel (16) for a fluid medium to pass through is opened in the valve body (11), a valve flap (17) extending into the flow channel (16) and capable of cutting off the flow channel (16) is fixedly arranged at the lower end of the valve stem (15), and the valve flap (17) and the inner wall of the flow channel (16) are both provided with a diaphragm (18); characterized in that: An inner shell (21) is fixedly arranged in the valve cavity (14), an inner slider (22) is arranged in the inner shell (21) and is limited to slide horizontally in the inner shell (21), an inner block is fixedly arranged at the left end of the inner slider (22), an inner groove (151) is opened at the right end of the valve stem (15), and when the valve flap (17) cuts off the flow channel (16), the inner groove (151) is located exactly on the left side of the inner block, and a driving spring (23) is arranged in the inner shell (21) to provide a driving force for the inner block to be embedded in the inner groove (151); The embedded block is provided with an inclined guiding contact surface (321).

2. The anti-loosening sealing diaphragm valve according to claim 1, characterized in that: The left side of the inner shell (21) is provided with an opening for the inner block to extend out, and the inner block is composed of a pushing section (31) and a contact section (32). The cross-sectional shape of the pushing section (31) is a square, and the right end of the pushing section (31) is in contact with the driving spring (23); the cross-sectional shape of the contact section (32) is a right triangle, one right-angled side of the contact section (32) is fixed to the left end of the pushing section (31), the other right-angled side is parallel to the lower end face of the pushing section (31), and the hypotenuse is the guide contact surface (321); the contact section (32) is adapted to the inner groove (151).

3. The anti-loosening sealing diaphragm valve according to claim 2, characterized in that: An inner filling block (41) is fixedly arranged in the inner shell (21); the right sides of the inner shell (21) and the inner filling block (41) are both in contact with the wall of the valve cavity (14); the driving spring (23) is extruded and arranged between the pushing section (31) and the inner filling block (41); a horizontal limiting guide hole (411) is opened inside the inner filling block (41); the right end of the inner sliding block (22) extends into and is limited in the limiting guide hole (411) to maintain the horizontal movement of the embedded block.

4. The anti-loosening sealing diaphragm valve according to claim 3, characterized in that: A horizontal through hole (51) is provided in the valve cover (12), and the right end of the inner slider (22) passes through the through hole (51) and extends out of the valve cover (12). A force-applying cover (52) is fixed to the right end of the inner slider (22) by means of threads, and the user can pull the force-applying cover (52) to the right to drive the contact section (32) to escape from the embedded groove (151).

5. The anti-loosening sealing diaphragm valve according to claim 4, characterized in that: The cross-sectional height of the force-applying cover (52) is greater than the aperture of the through hole (51), and the inner slider (22) and the inner embedded block are limited by the abutment between the force-applying cover (52) and the outer wall of the valve cover (12); A first limiting section (61) is fixedly provided at the right end of the pushing section (31), and a second limiting section (62) is fixedly provided at the left end of the inner filling block (41). Both the first limiting section (61) and the second limiting section (62) extend into the driving spring (23), and the inner sliding block (22) and the inner embedded block are limited by the abutment between the first limiting section (61) and the second limiting section (62).

6. The anti-loosening sealing diaphragm valve according to claim 4, characterized in that: A rubber pad (53) is fixedly arranged on the left end portion of the force applying cover (52).

7. The anti-loosening sealing diaphragm valve according to claim 1, characterized in that: A positioning protrusion (71) with a semicircular cross-section is fixedly provided on the upper end of the inner shell (21), and a positioning recess (72) for the positioning protrusion (71) to extend into is provided on the wall of the valve cavity (14).

8. The anti-loosening sealing diaphragm valve according to claim 3, characterized in that: An extension section (81) is fixedly provided at the lower end of the inner shell (21), and the extension section (81) is fixed to the valve cover (12) by a horizontal first screw (82); the inner filling block (41), the inner shell (21) and the valve cover (12) are fixed by a vertical second screw (83).

9. The anti-loosening sealing diaphragm valve according to claim 2, characterized in that: A support block (91) capable of supporting the embedded block is fixedly arranged at the left end of the inner shell (21).

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