CN116025720B

CN116025720B - Elastic sealing stop valve

Info

Publication number: CN116025720B
Application number: CN202310300185.7A
Authority: CN
Inventors: 董飞
Original assignee: Zhonghong Valve Co ltd
Current assignee: Zhonghong Valve Co ltd
Priority date: 2023-03-27
Filing date: 2023-03-27
Publication date: 2023-06-30
Anticipated expiration: 2043-03-27
Also published as: CN116025720A

Abstract

The invention relates to a valve, in particular to an elastic sealing stop valve, which comprises a valve body, an elastic valve clack, a valve rod and a hand wheel, wherein the valve rod is movably arranged in the valve body, the lower end of the valve rod is movably connected with the elastic valve clack, and the top of the valve rod is connected with the hand wheel. The elastic valve clack provided by the invention has an elastic sealing structure, when the funnel-shaped part of the elastic valve clack is positioned at the step position of the lower part of the opening and closing channel to contact, the opening and closing channel is blocked, and sealing is realized.

Description

Elastic sealing stop valve

Technical Field

The invention relates to a valve, in particular to an elastic sealing stop valve.

Background

The opening and closing member of the stop valve is a plug-shaped valve clack, the sealing surface is a plane or a conical surface, and the valve clack moves linearly along the central line of the fluid. The valve rod has a lifting rod type, and also has a lifting rotary rod type, and the stop valve is only suitable for full opening and full closing and is not suitable for adjustment and throttling.

The sealing of the existing stop valve is rigid sealing, and has no elastic sealing performance, and in actual use, because the sealing structure is rigid sealing, the valve clack is pressed to the valve seat to realize sealing by completely depending on the thrust of the valve rod, on one hand, under special working conditions, when the thrust of the valve rod is increased or decreased, the effective sealing cannot be realized; on the other hand, when the downward closing force of the valve rod is too large, the closing force acts on the valve clack through the valve rod, so that the sealing surface is damaged, and the valve seal is invalid.

Disclosure of Invention

The invention aims to overcome the defect that the sealing of the existing stop valve is rigid, and effective sealing cannot be realized when the thrust of a valve rod is increased or reduced. In order to solve the technical problems, the invention provides an elastic sealing stop valve which comprises a valve body, an elastic valve clack, a valve rod and a hand wheel, wherein the valve rod is movably arranged in the valve body, the lower end of the valve rod is movably connected with the elastic valve clack, the top of the valve rod is connected with the hand wheel, the top of the valve body is provided with a vertical downward non-penetrating opening and closing channel, two sides of the valve body are respectively provided with a liquid inlet channel and a liquid outlet channel, the liquid inlet channel and the liquid outlet channel are both communicated with the opening and closing channel, the elastic valve clack is positioned in the opening and closing channel, the communicating position of the liquid inlet channel and the opening and closing channel is lower than the communicating position of the liquid outlet channel and the opening and closing channel, the upper end and the bottom of the valve rod are respectively provided with a threaded part and a movable connecting part, the upper end of the elastic valve clack is rotatably connected with the lower end of the valve rod through the movable connecting part, the top end of the valve body is connected with a stud on the stud in a threaded connection with a second nut, the stud is sleeved with a valve cover sealing the upper end of the valve body, and the valve body is connected with the stud through the stud and the second nut.

Preferably, the valve cover further comprises a supporting seat and a first nut, the supporting seat is connected between the front end and the rear end of the valve cover, the first nut is connected to the middle of the supporting seat, and the valve rod is in threaded connection with the first nut through a threaded portion.

Preferably, a round hole for the valve rod to pass through is arranged in the middle of the valve cover, and a gap is reserved between the hole wall at the upper part of the round hole and the outer wall of the valve rod.

Preferably, the lower end of the elastic valve clack is funnel-shaped, and the bottom of the elastic valve clack is provided with a groove.

Preferably, the valve further comprises a sealing structure, the sealing structure comprises a gland, a lower pressing block, a screw rod and a third nut, a filler is arranged in a gap between the valve cover and the round hole, the lower pressing block is connected to the inner side of the supporting seat in a sliding mode, the gland is arranged below the lower pressing block, the lower pressing block and the gland are sleeved on the outer side of the valve rod, the lower portion of the gland is arranged in the round hole of the valve cover, the screw rod is hinged to the valve cover, the third nut is connected to the screw rod in a threaded mode, a clamping groove is formed in one end of the lower pressing block, and the screw rod is matched with the clamping groove.

Preferably, the dustproof mechanism comprises a circular slide rail, support rods, dustproof cloth and magnetic strips, the two ends of the valve body are connected with the circular slide rail, a plurality of support rods are connected between the circular slide rails on two sides in a sliding mode, the dustproof cloth is connected between the plurality of support rods, and the magnetic strips are connected on the two support rods which are far away from each other.

Preferably, the device further comprises a limiting structure, wherein the limiting structure comprises a guide block, a guide rod, a connecting frame and a limiting block, the guide block is connected to the support seat, the guide rod is connected to the guide block in a sliding mode, the connecting frame is connected to the top of the guide rod, the connecting frame is connected with the hand wheel in a rotating mode, and the limiting block is connected to the lower end and the middle of the guide rod.

Preferably, the valve further comprises a first sealing ring and a second sealing ring, and the first sealing ring and the second sealing ring are connected between the top of the valve body and the bottom of the valve cover.

The beneficial effects of the invention are as follows: 1. the elastic valve clack provided by the invention has an elastic sealing structure, when the funnel-shaped part of the elastic valve clack is positioned at the step position of the lower part of the opening and closing channel to contact, the opening and closing channel is blocked, and sealing is realized.

2. Packing is filled to the clearance department of valve rod and valve gap, and the briquetting moves down to compress tightly the packing under driving the third nut through twisting, can guarantee the leakproofness of valve rod and valve gap.

3. When this stop valve does not need the operation, the dustproof mechanism of setting can cover whole stop valve, avoids external impurity to fall on the stop valve, prevents that the stop valve from corroding, impaired, can prolong the life of stop valve.

4. The distance that the valve rod moves up and down can be limited through the limiting structure, and excessive deformation of the elastic valve clack caused by overlarge closing and opening forces of the valve rod is avoided.

Drawings

Fig. 1 is a schematic perspective view of the present invention.

Fig. 2 is a cross-sectional view of the present invention.

Fig. 3 is a schematic perspective view of the elastic valve clack and the valve rod of the present invention.

Fig. 4 is a schematic perspective view of a sealing structure according to the present invention.

Fig. 5 is a schematic perspective view of a dustproof mechanism according to the present invention.

Fig. 6 is a schematic perspective view of a limiting structure according to the present invention.

The marks in the drawings are: 1. valve body, 101, liquid inlet channel, 102, switching passageway, 103, liquid outlet channel, 2, elastic valve clack, 21, recess, 3, valve rod, 31, screw thread portion, 32, swing joint portion, 4, valve gap, 61, supporting seat, 62, first nut, 7, hand wheel, 8, double-screw bolt, 9, second nut, 11, seal structure, 111, gland, 112, briquetting down, 113, screw rod, 114, third nut, 115, packing, 12, dustproof mechanism, 121, circular slide rail, 122, bracing piece, 123, dust cloth, 124, magnetic stripe, 13, limit structure, 131, guide block, 132, guide bar, 133, link, 134, stopper, 14, first sealing washer, 15, second sealing washer.

Detailed Description

The invention is further described below with reference to the drawings and examples.

Example 1

An elastic sealing stop valve, as shown in figures 1, 2 and 3, comprises a valve body 1, an elastic valve clack 2, a valve rod 3 and a hand wheel 7, wherein an opening and closing channel 102 which is vertically downward and not penetrated is arranged at the top of the valve body 1, the opening and closing channel 102 is in a shape of a big-end-up ladder, a liquid inlet channel 101 and a liquid outlet channel 103 are respectively arranged at the left side and the right side of the valve body 1, the liquid inlet channel 101 and the liquid outlet channel 103 are respectively communicated with the opening and closing channel 102, the position where the liquid inlet channel 101 is communicated with the opening and closing channel 102 is lower than the position where the liquid outlet channel 103 is communicated with the opening and closing channel 102, the valve rod 3 is movably arranged in the opening and closing channel 102, a thread part 31 and a movable connecting part 32 are respectively arranged at the upper part and the bottom of the valve rod 3, the elastic valve clack 2 is slidably arranged at the lower part in the opening and closing channel 102, the lower extreme of elastic valve clack 2 is the funnel form, open there is recess 21 at elastic valve clack 2 bottom, elastic valve clack 2 upper end is connected through swing joint portion 32 rotation with valve rod 3 lower extreme, the top circumference of valve body 1 is evenly spaced and is connected with four double-screw bolts 8, four equal threaded connection of double-screw bolts 8 has the nut, the cover is equipped with valve gap 4 between four double-screw bolts 8, valve gap 4 is used for sealed valve body 1 upper end, valve gap 4 is connected through double-screw bolt 8 and second nut 9 with valve body 1, valve gap 4 middle part is equipped with the round hole that supplies valve rod 3 to pass, be connected with supporting seat 61 between the front and back both ends of valve gap 4, supporting seat 61 middle part is connected with first nut 62, valve rod 3 passes through screw thread portion 31 and first nut 62 threaded connection, valve rod 3 upper end is connected with hand wheel 7.

The liquid inlet channel 101 and the liquid outlet channel 103 of the valve body 1 are respectively connected with a pipeline, the hand wheel 7 is rotated to drive the valve rod 3 to rotate, the valve rod 3 can move upwards or downwards through the cooperation of the threaded part 31 and the first nut 62, when the valve rod 3 moves downwards, the elastic valve clack 2 moves downwards along with the valve rod, the funnel-shaped part of the elastic valve clack 2 is positioned at the step position of the lower part of the opening and closing channel 102 to be contacted due to the fact that the opening and closing channel 102 is big-end-up small-step-shaped, and therefore the opening and closing channel 102 is blocked, sealing is achieved, and due to the fact that the elastic valve clack 2 has the elastic sealing function, when the liquid inlet channel 101 enters a fluid medium, the groove 21 part of the elastic valve clack 2 can deform by utilizing the pressure of the fluid medium, and the sealing surface of the elastic valve clack 2 expands outwards, so that the elastic valve clack 2 is tightly attached to the valve body 1, and better sealing can be achieved. When the valve rod 3 moves upwards, the elastic valve clack 2 moves upwards, the fluid medium flows to the liquid outlet channel 103 through the opening and closing channel 102, the elastic valve clack 2 elastically resets, and finally flows out through the liquid outlet channel 103. If the downward closing force of the valve rod 3 is too large, the closing force acts on the elastic valve clack 2 through the valve rod 3, so that the elastic valve clack 2 can realize micro deformation and absorb the downward overstretch force, thereby playing a role in protecting the sealing surface of the valve body 1 and reducing the failure rate of the stop valve.

As shown in fig. 4, the sealing structure 11 further comprises a sealing structure 11, the sealing structure 11 comprises a pressing cover 111, a lower pressing block 112, a screw 113 and a third nut 114, a filler 115 is arranged at the upper part of a round hole of the valve cover 4, the filler 115 is in contact with the valve rod 3, the lower pressing block 112 is connected with the inner side of the supporting seat 61 in a sliding manner, a vertical through hole is formed in the lower pressing block 112, the valve rod 3 passes through the through hole, the pressing cover 111 is arranged below the lower pressing block 112, the pressing cover 111 is sleeved outside the valve rod 3, the lower part of the pressing cover 111 is positioned in the round hole of the valve cover 4, the lower end of the pressing cover 111 is in contact with the upper end of the filler 115, the screw 113 is hinged to the left side of the valve cover 4, the third nut 114 is connected with threads on the screw 113, and a clamping groove is formed in the left end of the lower pressing block 112, and the screw 113 is matched with the clamping groove.

When the packing 115 is filled in the gap between the valve rod 3 and the valve cover 4, the third nut 114 is screwed, the third nut 114 moves downwards on the screw 113, the third nut 114 drives the lower pressing block 112 to move downwards, the lower pressing block 112 presses the pressing cover 111 to press the packing 115 downwards, the tightness of the valve rod 3 and the valve cover 4 is ensured, when the packing 115 needs to be replaced, the third nut 114 is unscrewed reversely, the stirring screw 113 swings anticlockwise to move out of the clamping groove, the pressing cover 111 and the lower pressing block 112 are pulled to move upwards, the packing 115 can be taken out of a round hole of the valve cover 4 and put into a new packing 115, the pressing cover 111 and the lower pressing block 112 are pulled to move downwards, the stirring screw 113 swings clockwise to be sleeved in the clamping groove, and the third nut 114 is screwed, so that the packing 115 is compressed.

Example 2

On the basis of embodiment 1, as shown in fig. 5, the dustproof mechanism 12 is further comprised of a round slide rail 121, support rods 122, dustproof cloth 123 and magnetic strips 124, the left and right ends of the valve body 1 are connected with the round slide rail 121 in a bolt connection mode, the round slide rail 121 is sleeved outside the valve body 1, six support rods 122 are slidingly connected between the round slide rails 121 on two sides, the support rods 122 are n-shaped, the dustproof cloth 123 is connected between the support rods 122 in an adhesive connection mode, the dustproof cloth 123 has elasticity, and the magnetic strips 124 are connected to the two support rods 122 which are far away from each other.

When this stop valve does not need the operation, can stir the bracing piece 122 of top and move anticlockwise along circular slide rail 121, dust cloth 123 expansion, when the magnetic stripe 124 on the rotatory back of a week on top bracing piece 122 and the magnetic stripe 124 on the below bracing piece 122 contacts, two magnetic stripes 124 inhale the bracing piece 122 of top fixedly mutually, and dust cloth 123 can cover whole stop valve, avoids external impurity to fall on the stop valve, prevents that the stop valve from corroding, impaired, can prolong the life of stop valve. When the stop valve is needed, the two magnetic strips 124 are separated, and the support rod 122 can be shifted to reset along the circular slide rail 121 clockwise.

As shown in fig. 6, the valve rod further comprises a limiting structure 13, the limiting structure 13 comprises a guide block 131, a guide rod 132, a connecting frame 133 and a limiting block 134, both sides of the supporting seat 61 are respectively connected with the guide block 131, the guide block 131 is slidingly connected with the guide rod 132, a connecting frame 133 is connected between the tops of the two guide rods 132, the top of the connecting frame 133 is rotatably connected with the bottom of the hand wheel 7, the connecting frame 133 is sleeved outside the valve rod 3, and the lower end and the middle of the guide rod 132 are respectively connected with the limiting block 134.

When the valve rod 3 moves downwards, the hand wheel 7 moves downwards along with the hand wheel 7, the connecting frame 133 moves downwards, when the limiting block 134 above moves downwards and is blocked by the guide block 131, the valve rod 3 cannot continue to move downwards, when the valve rod 3 moves upwards, the hand wheel 7 moves upwards along with the limiting block, the hand wheel 7 drives the connecting frame 133 to move upwards, when the limiting block 134 below moves upwards and is blocked by the guide block 131, the valve rod 3 cannot continue to move upwards, the distance between the upward movement and the downward movement of the valve rod 3 is limited, and excessive deformation of the elastic valve clack 2 caused by excessive closing and opening force of the valve rod 3 is avoided.

As shown in fig. 2, the valve further comprises a first sealing ring 14 and a second sealing ring 15, wherein the first sealing ring 14 is connected between the outer side of the top of the valve body 1 and the outer side of the bottom of the valve cover 4, and the second sealing ring 15 is connected between the inner side of the top of the valve body 1 and the inner side of the bottom of the valve cover 4.

The first seal ring 14 and the second seal ring 15 are provided to enhance the sealability of the valve body 1 and the valve cover 4.

The foregoing examples have shown only the preferred embodiments of the invention, which are described in more detail and are not to be construed as limiting the scope of the invention. It should be noted that modifications, improvements and substitutions can be made by those skilled in the art without departing from the spirit of the invention, which are all within the scope of the invention. Accordingly, the scope of protection of the present invention is to be determined by the appended claims.

Claims

1. The utility model provides an elastic seal stop valve, which comprises a valve body (1), elastic valve clack (2), valve rod (3) and hand wheel (7), valve rod (3) internal movement is equipped with valve rod (3), valve rod (3) lower extreme swing joint has elastic valve clack (2), valve rod (3) top is connected with hand wheel (7), characterized in that, valve body (1) top is equipped with perpendicular decurrent and non-throughout switching passageway (102), valve body (1) both sides are equipped with feed liquor passageway (101) and drain passageway (103) respectively, feed liquor passageway (101) and drain passageway (103) all communicate with each other with switching passageway (102), elastic valve clack (2) are located switching passageway (102), feed liquor passageway (101) are located and switching passageway (102) and are communicated with each other the department of drain passageway (103) and switching passageway (102), valve rod (3) upper portion and bottom are equipped with screw thread portion (31) and movable connection portion (32) respectively, valve body (2) upper end and valve rod (3) lower extreme are connected through movable connection portion (32) rotation, valve body (1) top end is connected with stud (8), be equipped with on valve body (8) screw cap (9), the valve cover (4) is connected with the valve body (1) through a stud (8) and a second nut (9);

the valve cover also comprises a supporting seat (61) and a first nut (62), the supporting seat (61) is connected between the front end and the rear end of the valve cover (4), the first nut (62) is connected with the middle part of the supporting seat (61),

the valve rod (3) is in threaded connection with the first nut (62) through the threaded part (31);

the lower end of the elastic valve clack (2) is funnel-shaped, and a groove (21) is arranged at the bottom of the elastic valve clack (2); the sealing structure (11) comprises a gland (111), a lower pressing block (112), a screw (113) and a third nut (114), a filler (115) is arranged in a gap between the valve cover (4) and the round hole, the lower pressing block (112) is connected to the inner side of the supporting seat (61) in a sliding mode, the gland (111) is arranged below the lower pressing block (112), the lower pressing block (112) and the gland (111) are sleeved on the outer side of the valve rod (3), the lower part of the gland (111) is located in the round hole of the valve cover (4), the screw (113) is hinged to the valve cover (4), the third nut (114) is connected to the screw (113) in a threaded mode, a clamping groove is formed in one end of the lower pressing block (112), and the screw (113) is matched with the clamping groove;

still including limit structure (13), limit structure (13) are including guide block (131), guide bar (132), link (133) and stopper (134), are connected with guide block (131) on supporting seat (61), are connected with guide bar (132) on guide block (131) slidingtype, and guide bar (132) top is connected with link (133), and link (133) are connected with hand wheel (7) rotation, and the lower extreme and the middle part of guide bar (132) all are connected with stopper (134).

2. An elastic sealing stop valve according to claim 1, characterized in that the middle part of the valve cover (4) is provided with a round hole for the valve rod (3) to pass through, and a gap is reserved between the hole wall at the upper part of the round hole and the outer wall of the valve rod (3).

3. The elastic sealing stop valve according to claim 2, further comprising a dustproof mechanism (12), wherein the dustproof mechanism (12) comprises a circular slide rail (121), support rods (122), dustproof cloth (123) and magnetic strips (124), the two ends of the valve body (1) are connected with the circular slide rail (121), a plurality of support rods (122) are slidably connected between the circular slide rails (121) on two sides, the dustproof cloth (123) is connected between the plurality of support rods (122), and the magnetic strips (124) are connected on the two support rods (122) which are far away from each other.

4. An elastic sealing stop valve according to claim 1, further comprising a first sealing ring (14) and a second sealing ring (15), wherein the first sealing ring (14) and the second sealing ring (15) are connected between the top of the valve body (1) and the bottom of the valve cover (4).