Novel balance stop valve

Abstract

The utility model provides a novel balance stop valve, and belongs to the technical field of fluid control. The novel balance stop valve comprises a stop valve body and an overhaul locking assembly, the stop valve body comprises a valve rod, a valve body and a driving device, a valve element assembly is arranged in the valve body, one end of the valve rod is connected with the valve element assembly, the driving device comprises a cylinder body and an actuating rod, a piston is arranged on the actuating rod and penetrates through the cylinder body, the piston is located in the cylinder body, and the valve element assembly is connected with the actuating rod. Two ends of the actuating rod are respectively positioned outside two ends of the cylinder body; one end of the actuating rod is connected with the other end of the valve rod; the maintenance locking assembly comprises a locking support and a locking rod, the locking support is provided with a through cavity, the inner wall of the cavity is provided with an internal thread, one end of the locking support is detachably connected with one end of the cylinder body, the other end of the actuating rod is located in the cavity, a part of the locking rod extends into the cavity, and the middle of the locking rod is provided with an external thread connected with the internal thread.

Description

TECHNICAL FIELD

[0001] The utility model relates to fluid control technical field, especially a novel balance stop valve. BACKGROUND

[0002] High pressure water descaling technology has become an important link of controlling billet quality, and pump is the source of high pressure water in high pressure water system, and it occupies an important position in the whole system, in order to ensure the normal operation and service life of pump, pump outlet is usually provided with check valve, balance stop valve and pump circulation pipeline. The balance stop valve is usually used as a maintenance gate valve, and the main driving mode of the balance stop valve includes manual, electric, pneumatic and hydraulic. The working pressure of the balance stop valve is large, so the pressure of the working medium borne by the valve sealing part is also large.

[0003] The pneumatic device or the hydraulic device may have driving force fluctuation due to certain special reasons. When the driving force fluctuation occurs, the driving force is instantaneously reduced. If the driving force fluctuation occurs suddenly during the manual maintenance of the balance stop valve, the valve may be opened by the working medium, which may cause a safety accident. UTILITY MODEL CONTENTS

[0004] The utility model discloses a novel balance stop valve, which solves the risk of the valve being opened by the working medium during manual maintenance, and improves safety.

[0005] To achieve the purpose of the utility model, the utility model adopts the following technical scheme:

[0006] The utility model discloses a novel balance stop valve, which solves the risk of the valve being opened by the working medium during manual maintenance, and improves safety.

[0007] According to an embodiment of the utility model, one end of the locking rod is located outside the cavity, the other end of the locking rod is a polygonal clamping part, and the polygonal clamping part is configured to cooperate with a wrench.

[0008] According to an embodiment of the utility model, wherein, the maintenance locking assembly still includes the tubular protective cover, one end of tubular protective cover is coaxial installation in the other end of locking support, tubular protective cover surrounds locking rod, the other end of locking rod is located in the cavity of tubular protective cover.

[0009] According to an embodiment of the utility model, wherein, the valve body is provided with water inlet channel, water outlet channel and valve core chamber, the valve core assembly is movably arranged in the valve core chamber, when the valve core assembly is in the first position, the water inlet channel is communicated with the water outlet channel, when the valve core assembly is in the second position, the valve core assembly blocks the communication of the water inlet channel and the water outlet channel.

[0010] According to an embodiment of the utility model, wherein, the valve body further has a cylindrical valve sleeve, a water containing cavity is further provided in the valve body, the water containing cavity is communicated with the water outlet channel, the cylindrical valve sleeve is arranged in the valve core chamber, a first water passing hole is provided in the position of the water containing cavity of the cylindrical valve sleeve, the valve core assembly is movably arranged in the cylindrical valve sleeve, when the valve core assembly is in the first position, there is a distance between the valve core assembly and the first water passing hole, and the water inlet channel is communicated with the water containing cavity through the first water passing hole, when the valve core assembly is in the second position, the valve core assembly blocks the first water passing hole to block the communication of the water inlet channel and the water containing cavity.

[0011] According to an embodiment of the utility model, further include first flange, first flange is sleeved on the valve stem and is installed on the valve body, the valve core chamber has an annular step, one end of the cylindrical valve sleeve abuts against the annular step, the other end of the cylindrical valve sleeve abuts against the first flange.

[0012] According to an embodiment of the utility model, wherein, the valve core assembly is provided with at least one second water passing hole, when the valve core assembly is in the second position, there is a first balance cavity between the first flange and the valve core assembly, the second water passing hole communicates the water inlet channel and the first balance cavity, the water in the water inlet channel exerts water pressure on the valve core assembly towards the first direction, the water in the first balance cavity exerts water pressure on the valve core assembly towards the second direction opposite to the first direction.

[0013] According to an embodiment of the utility model, further include second flange and sleeve, the second flange and sleeve are both sleeved on the valve stem, one end of the sleeve abuts against the first flange, the other end of the sleeve abuts against the second flange, the second flange is connected with the first flange by a plurality of bolts, the sleeve and the valve stem have an annular second balance cavity, the valve stem is provided with a water channel, the second balance cavity is communicated with the water inlet channel through the water channel, the water in the second balance cavity exerts water pressure on the valve stem towards the second direction.

[0014] According to an embodiment of the utility model, further include third flange, the third flange is connected with the second flange by bolts, and the third flange and the second flange have a spacing, the cylinder is installed on the third flange.

[0015] According to an embodiment of the present application, the driving device is a hydraulic drive or a pneumatic drive.

[0016] The embodiment of the present application has the following advantages or beneficial effects:

[0017] The novel balanced stop valve comprises a stop valve body and a maintenance locking assembly, the stop valve body comprises a valve rod, a valve body and a driving device, the valve body is internally provided with a valve core assembly, one end of the valve rod is connected with the valve core assembly, the driving device comprises a cylinder body and an action rod, the action rod is provided with a piston, the action rod is arranged in the cylinder body, the piston is arranged in the cylinder body, and the two ends of the action rod are arranged outside the two ends of the cylinder body, one end of the action rod is connected with the other end of the valve rod; the maintenance locking assembly comprises a locking support and a locking rod, the locking support is provided with a through cavity, the inner wall of the cavity is provided with an internal thread, one end of the locking support is detachably connected with one end of the cylinder body, the other end of the action rod is arranged in the cavity, and a part of the locking rod is arranged in the cavity, the middle part of the locking rod is provided with an external thread connected with the internal thread. When the maintenance is performed, the driving device pushes the valve rod and the valve core assembly in the second direction, when the valve core assembly reaches the second position, the valve core assembly closes the water outlet channel; then the locking rod is rotated to move the locking rod in the direction of the action rod until the one end of the locking rod abuts against the action rod, and the locking is completed. At this time, the action rod, the valve rod and the valve core assembly cannot move in the first direction, the safety of the maintenance is improved, and the safety accident caused by the water medium rushing out of the valve when the driving force fluctuates is avoided. When the maintenance is completed, the locking rod is rotated in the opposite direction, so that the one end of the locking rod is spaced apart from the action rod, and the spacing can enable the valve core assembly to reach the first position from the second position, and the water inlet channel and the water outlet channel are communicated when the valve core assembly is in the first position. BRIEF DESCRIPTION OF DRAWINGS

[0018] The above and other features and advantages of the present application will become more apparent by describing in detail example embodiments thereof with reference to the attached drawings in which:

[0019] Figure 1 is a sectional view of a novel balanced stop valve according to an example embodiment.

[0020] In the drawings, the following reference numerals are used:

[0021] 1, stop valve body; 11, valve stem; 111, shaft coupling; 12, valve body; 121, valve core assembly; 1211, second water passage; 122, water inlet channel; 123, water outlet channel; 124, cylindrical valve sleeve; 1241, first water passage; 125, water containing cavity; 13, driving device; 131, cylinder body; 132, action rod; 133, piston; 2, maintenance locking assembly; 21, locking support; 211, cavity; 22, locking rod; 221, polygonal clamping part; 23, cylindrical protective cover; 3, first flange; 31, first balance cavity; 4, second flange; 5, sleeve; 51, second balance cavity; 6, third flange; 7, first shaft sleeve; 8, second shaft sleeve; 9, third shaft sleeve. DETAILED DESCRIPTION

[0022] Example implementations will now be described more fully with reference to the accompanying drawings. Example implementations may, however, be implemented in many different forms and should not be construed as limited to the implementations set forth herein; rather, these implementations are provided so that this disclosure will be thorough and complete, and will fully convey the concept of example implementations to those skilled in the art. Like reference numerals refer to like elements throughout the figures, and thus a detailed description of them will not be repeated.

[0023] The terms "a", "an", "the", "said", and "s" are used to refer to one or more elements / components / etc.; the terms "include" and "has" are used to mean that there are additional elements / components / etc. in addition to those listed.

[0024] As Figure 1 shown, the utility model discloses a novel balance stop valve, including stop valve body 1 and maintenance locking assembly 2.

[0025] Stop valve body 1 includes valve stem 11, valve body 12 and driving device 13, and valve body 12 has valve core assembly 121, one end of valve stem 11 is connected with valve core assembly 121, and driving device 13 includes cylinder body 131 and action rod 132, and action rod 132 has piston 133, and action rod 132 is arranged in cylinder body 131, and piston 133 is located in cylinder body 131, and both ends of action rod 132 are located outside both ends of cylinder body 131, and one end of action rod 132 is connected with the other end of valve stem 11.

[0026] The overhauling locking assembly 2 comprises a locking support 21 and a locking rod 22, the locking support 21 has a through cavity 211, the inner wall of the cavity 211 is provided with an internal thread, one end of the locking support 21 is detachably connected with one end of the cylinder body 131, and the other end of the action rod 132 is located in the cavity 211, and a part of the locking rod 22 extends into the cavity 211, and the middle part of the locking rod 22 is provided with an external thread for being connected with the internal thread of the locking support 21.

[0027] When the driving device 13 pulls the valve rod 11 and the valve core assembly 12 to the first direction, the water inlet channel 122 and the water outlet channel 123 are communicated; when the driving device 13 pushes the valve rod 11 and the valve core assembly 12 to the second direction, the valve core assembly 12 closes the water outlet channel 123.

[0028] When overhauling, the driving device 13 pushes the valve rod 11 and the valve core assembly 12 to the second direction, when the valve core assembly 12 reaches the second position, the valve core assembly 12 closes the water outlet channel 123; then the locking rod 22 is rotated to move the locking rod 22 to the direction of the action rod 132 until the one end of the locking rod 22 abuts against the action rod 132, and the locking is completed.

[0029] When the overhauling is completed, the locking rod 22 is rotated in the opposite direction, so that the one end of the locking rod 22 is spaced apart from the action rod 132, and the spacing can enable the valve core assembly 12 to reach the first position from the second position, and when the valve core assembly 12 is in the first position, the water inlet channel 122 and the water outlet channel 123 are communicated.

[0030] As shown in Figure 1 In a preferred embodiment of the utility model, the other end of the locking rod 22 is located outside the cavity 211, the other end of the locking rod 22 is a polygonal clamping part 221, and the polygonal clamping part 221 is configured to cooperate with a wrench, and the polygonal clamping part 221 is clamped by the wrench to rotate the locking rod 22.

[0031] As shown in Figure 1 In a preferred embodiment of the utility model, the overhauling locking assembly 2 further comprises a cylindrical protective cover 23, one end of the cylindrical protective cover 23 is coaxially installed at the other end of the locking support 21, the cylindrical protective cover 23 surrounds the locking rod 22, the other end of the locking rod 22 is located outside the cavity of the cylindrical protective cover 23, and the cylindrical protective cover 23 is used for placing dust and debris into the locking support 21.

[0032] As shown in Figure 1As shown, in a preferred embodiment of the present invention, the valve body 12 has an inlet channel 122, an outlet channel 123 and a valve core cavity. The valve core assembly 121 is movably disposed in the valve core cavity. When the valve core assembly 121 is in the first position, the inlet channel 122 is connected to the outlet channel 123. When the valve core assembly 121 is in the second position, the valve core assembly 121 blocks the connection between the inlet channel 122 and the outlet channel 123.

[0033] like Figure 1 As shown, in a preferred embodiment of the present invention, the valve body 12 also has a cylindrical valve sleeve 124, and a water-containing cavity 125 is also provided in the valve body 12. The water-containing cavity 125 is connected to the water outlet channel 123. The cylindrical valve sleeve 124 is disposed in the valve core cavity. The cylindrical valve sleeve 124 is provided with a first water passage hole 1241 at the position of the water-containing cavity 125. The valve core assembly 121 is movably disposed in the cylindrical valve sleeve 124.

[0034] When the valve core assembly 121 is in the first position, there is a distance between the valve core assembly 121 and the first water passage 1241, and the water inlet channel 122 is connected to the water storage chamber 125 through the first water passage 1241. The water storage chamber 125 is connected to the water outlet channel 123, so that the water in the water inlet channel 122 enters the water outlet channel 123 through the first water passage 1241 and the water storage chamber 125.

[0035] When the valve core assembly 121 is in the second position, the valve core assembly 121 blocks the first water passage 1241 to block the connection between the water inlet channel 122 and the water chamber 125.

[0036] like Figure 1 As shown, in a preferred embodiment of the present invention, a first flange 3 is further included. The first flange 3 is sleeved on the valve stem 11 and installed on the valve body 12. The valve core cavity has an annular step. One end of the cylindrical valve sleeve 124 abuts against the annular step, and the other end of the cylindrical valve sleeve 124 abuts against the first flange 3, thereby fixing the cylindrical valve sleeve 124.

[0037] like Figure 1 As shown, in a preferred embodiment of the present invention, the valve core assembly 121 has at least one second water passage hole 1211. When the valve core assembly 121 is in the second position, a first balance chamber 31 is provided between the first flange 3 and the valve core assembly 121. The second water passage hole 1211 connects the water inlet channel 122 and the first balance chamber 31. The water in the water inlet channel 122 applies water pressure to the valve core assembly 121 in a first direction. The water in the first balance chamber 31 applies water pressure to the valve core assembly 121 in a second direction opposite to the first direction, so as to reduce the water pressure in the first direction on the valve core assembly 121 and avoid excessive water pressure in the first direction, which would reduce the service life of the drive device 13.

[0038] likeFigure 1 As shown, in a preferred embodiment of this utility model, a second flange 4 and a sleeve 5 are further included. The second flange 4 and the sleeve 5 are both sleeved on the valve stem 11. One end of the sleeve 5 abuts against the first flange 3, and the other end of the sleeve 5 abuts against the second flange 4. The second flange 4 is connected to the first flange 3 by a plurality of bolts. There is an annular second balancing cavity 51 between the sleeve 5 and the valve stem 11. The valve stem 11 has a water channel. The second balancing cavity 51 is connected to the water inlet channel 122 through the water channel. The water in the second balancing cavity 51 applies water pressure to the valve stem 11 in the second direction.

[0039] The water pressure in the inlet channel 122 is equal to the sum of the water pressure in the first balance chamber 31 and the water pressure in the second balance chamber 51. This means that when the drive device drives the valve core assembly, it only needs to overcome the friction of the valve core assembly, thereby reducing the impact force on the valve core assembly and the drive device and thus improving the service life of the valve core assembly and the drive device.

[0040] The valve stem 11 has an annular step located within the second balance chamber 51, and the annular step is configured as a force application point for applying pressure in the second direction.

[0041] like Figure 1 As shown, in a preferred embodiment of the present invention, a third flange 6 is further included. The third flange 6 is connected to the second flange 4 by bolts, and there is a gap between the third flange 6 and the second flange 4. The cylinder body 131 is mounted on the third flange 6.

[0042] like Figure 1 The drive device 13 shown is a hydraulic drive device. Of course, the drive device 13 is not limited to hydraulic drive. For example, it can also be pneumatic drive. Those skilled in the art can select the required drive method according to actual needs.

[0043] like Figure 1 As shown, in a preferred embodiment of this utility model, the valve stem 11 and the actuating rod 132 are connected by a coupling.

[0044] like Figure 1 As shown, in a preferred embodiment of this utility model, it further includes a first bushing 7, a second bushing 8, and a third bushing 9. The first bushing 7 is sealed outside the valve stem 11 and fixed to the center of the third flange 6. The second bushing 8 is sealed outside the valve stem 11 and fixed to the center of the second flange 4. The third bushing 9 is sealed outside the valve stem 11 and fixed to the center of the first flange 3, thereby improving coaxiality and sealing performance.

[0045] In the embodiments of the present application, the term "a plurality of" refers to two or more than two, unless otherwise explicitly limited. The terms "mounting", "connecting", "fixing" and the like should be understood in a broad sense, for example, "connecting" can be fixed connection, can also be detachable connection, or integrally connected. For ordinary skilled in the art, the specific meaning of the above terms in the embodiments of the present application can be understood according to the specific circumstances.

[0046] In the description of the embodiments of the present application, it should be understood that the terms "upper", "lower" and the like indicate the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the embodiments of the present application and simplifying the description, and do not indicate or imply that the devices or units referred to must have a particular direction, be constructed and operated in a particular orientation, therefore, it cannot be understood as a limitation on the embodiments of the present application.

[0047] In the description of the present application, the terms "one embodiment", "one preferred embodiment" and the like mean that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present application. In the present application, the illustrative description of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any one or more embodiments or examples in a suitable manner.

[0048] The above is only the preferred embodiment of the present application, and is not intended to limit the embodiments of the present application. For those skilled in the art, the embodiments of the present application can have various modifications and changes. Any modification, equivalent replacement, improvement, etc. made within the spirit and principles of the embodiments of the present application shall be included in the protection scope of the embodiments of the present application.

Claims

1. A new balanced stop valve, characterized in that, The utility model relates to a kind of valve and its locking assembly, including: Shutoff valve body (1), the shutoff valve body (1) includes valve stem (11), valve body (12) and driving device (13), the valve body (12) has valve core assembly (121) in it, one end of the valve stem (11) is connected with the valve core assembly (121), the driving device (13) includes cylinder (131) and action rod (132), the action rod (132) has piston (133) on it, the action rod (132) is worn in the cylinder (131), and the piston (133) is located in the cylinder (131), both ends of the action rod (132) are located outside both ends of the cylinder (131) respectively, one end of the action rod (132) is connected with the other end of the valve stem (11); Overhaul locking assembly (2), the overhaul locking assembly (2) includes locking support (21) and locking rod (22), the locking support (21) has through cavity (211), the cavity (211) inner wall has internal thread, one end of the locking support (21) is detachably connected with one end of the cylinder (131), and the other end of the action rod (132) is located in the cavity (211), a part of the locking rod (22) is inserted into the cavity (211), the middle part of the locking rod (22) has external thread connected with the internal thread, one end of the locking rod (22) is in abutment with the action rod (132) when overhauling, and there is spacing between one end of the locking rod (22) and the action rod (132) when overhauling is completed.

2. The new balanced stop valve according to claim 1, characterized in that, The other end of the locking rod (22) is located outside the cavity (211), and the other end of the locking rod (22) is a polygonal clamping portion (221), which is configured to cooperate with a wrench.

3. The new balanced stop valve according to claim 1, characterized in that, The overhaul locking assembly (2) further includes a cylindrical protective cover (23), one end of the cylindrical protective cover (23) is coaxially installed on the other end of the locking support (21), the cylindrical protective cover (23) surrounds the locking rod (22), and the other end of the locking rod (22) is located outside the cavity of the cylindrical protective cover (23).

4. The new balanced stop valve according to claim 1, characterized in that, The valve body (12) is provided with a water inlet passage (122), a water outlet passage (123) and a valve core cavity, the valve core assembly (121) is movably arranged in the valve core cavity, when the valve core assembly (121) is in a first position, the water inlet passage (122) and the water outlet passage (123) are communicated, and when the valve core assembly (121) is in a second position, the valve core assembly (121) blocks the communication between the water inlet passage (122) and the water outlet passage (123).

5. The novel balanced cut-off valve according to claim 4, characterized in that The valve body (12) further has a cylindrical valve sleeve (124) and a water containing cavity (125) is formed in the valve body (12) and communicates with the water outlet channel (123), the cylindrical valve sleeve (124) is arranged in the valve core cavity, the cylindrical valve sleeve (124) is provided with a first water passing hole (1241) at the position of the water containing cavity (125), the valve core assembly (121) is movably arranged in the cylindrical valve sleeve (124), when the valve core assembly (121) is at the first position, the valve core assembly (121) is spaced apart from the first water passing hole (1241), and the water inlet channel (122) communicates with the water containing cavity (125) through the first water passing hole (1241), when the valve core assembly (121) is at the second position, the valve core assembly (121) blocks the first water passing hole (1241) to block the communication between the water inlet channel (122) and the water containing cavity (125).

6. The new balanced stop valve according to claim 5, characterized in that, The first flange (3) is sleeved on the valve rod (11) and is arranged on the valve body (12), the valve core cavity has an annular step, one end of the cylindrical valve sleeve (124) abuts against the annular step, and the other end of the cylindrical valve sleeve (124) abuts against the first flange (3).

7. The novel balanced cut-off valve according to claim 6, characterized in that The valve core assembly (121) is provided with at least one second water passing hole (1211), when the valve core assembly (121) is at the second position, the first flange (3) and the valve core assembly (121) have a first balance cavity (31) therebetween, the second water passing hole (1211) communicates the water inlet channel (122) and the first balance cavity (31), water in the water inlet channel (122) exerts water pressure on the valve core assembly (121) in a first direction, and water in the first balance cavity (31) exerts water pressure on the valve core assembly (121) in a second direction opposite to the first direction.

8. The new balanced stop valve according to claim 7, characterized in that, The second flange (4) and the sleeve (5) are both sleeved on the valve rod (11), one end of the sleeve (5) abuts against the first flange (3), the other end of the sleeve (5) abuts against the second flange (4), the second flange (4) is connected with the first flange (3) through a plurality of bolts, the sleeve (5) and the valve rod (11) have an annular second balance cavity (51) therebetween, the valve rod (11) is provided with a water channel, the second balance cavity (51) communicates with the water inlet channel (122) through the water channel, and water in the second balance cavity (51) exerts water pressure on the valve rod (11) in a second direction.

9. The novel balanced seat valve according to claim 8, characterized in that The third flange (6) is connected with the second flange (4) through bolts, and the third flange (6) and the second flange (4) have a spacing therebetween, and the cylinder body (131) is arranged on the third flange (6).

10. The new balanced stop valve according to claim 1, characterized in that, The driving device (13) is a hydraulic drive or a pneumatic drive.

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