A valve disc limiting shaft assembly and a valve disc structure and valve composed of the same

Abstract

The present invention relates to the field of valve technology, and specifically to a valve flap limiting shaft assembly and a valve flap structure and valve composed thereof. A valve flap limiting shaft assembly of the present invention comprises: a valve flap limiting shaft; at least one support seat, the support seat having a first mounting hole, a transverse through groove connected to the first mounting hole is arranged on the side of the support seat facing the valve flap limiting shaft, and the end of the valve flap limiting shaft moves into the first mounting hole through the transverse through groove; a stopper, arranged at the end of the valve flap limiting shaft, comprising a main body and at least two relatively arranged extensions, the extension having a first state in which the projection on the valve flap limiting shaft falls on the side of the support seat facing the valve flap limiting shaft, and a second state in which the projection on the valve flap limiting shaft at least partially falls in the transverse through groove. The present invention simplifies the difficulty of installation through the structural setting, and the structure of the assembly accessories is simpler, so that the manufacturing is simpler and the cost is lower.

Description

Technical Field

[0001] The invention relates to the technical field of valves, and in particular to a valve flap limiting shaft assembly and a valve flap structure and a valve composed thereof. Background Art

[0002] A valve is usually composed of a valve body, a valve flap assembly, and a fixed structure connecting the valve body and the valve flap assembly. The fixed structure in the prior art usually includes a mounting seat and a valve flap limiting shaft arranged just above the valve flap assembly for limiting the rotation range of the valve flap.

[0003] In the prior art, there are two main ways to install the valve disc limit shaft. The first way is to install it on the mounting seat together with the valve disc assembly, then place the installed whole assembly into the valve body, and then fix the mounting seat on the valve body by means of screws or other fixing structures. The second way is to install the valve disc assembly on the mounting seat, then place the mounting seat with the valve disc assembly installed into the valve body, and finally install the valve disc limit shaft on the mounting seat.

[0004] During the installation of the valve, whether it is the first installation method or the second installation method, in order to ensure the integrity of the sealing waterline surface and improve the sealing performance of the valve after installation, it is necessary to enable the fixed installation method to avoid damage to the sealing waterline surface of the valve end face.

[0005] When the second installation method is adopted, under the premise of not damaging the sealing waterline surface, the valve disc limit shaft will have the problems of relatively complex structure, high manufacturing cost, great assembly difficulty, and very inconvenient disassembly after assembly.

[0006] For example, the document CN109764163A discloses a fixed structure, a double-flap check valve and an assembly process, wherein the fixed shaft assembly in the fixed structure is the valve disc limiting shaft. The fixed shaft assembly includes a first fixed shaft and a second fixed shaft arranged coaxially, and a connecting assembly connecting the first fixed shaft and the second fixed shaft, wherein the connecting assembly includes a sleeve and a connecting structure, wherein the connecting structure is used to fix the sleeve arranged at the connection between the first fixed shaft and the second fixed shaft. The connecting structure is a solder for welding the sleeve to the first fixed shaft and the second fixed shaft respectively. During installation, the sleeve needs to be sleeved on one of the fixed shafts first, and then the first fixed shaft and the second fixed shaft are installed on the mounting seat respectively, and then the first fixed shaft and the second fixed shaft are connected by moving the position of the sleeve, and finally the sleeve is fixed to the first fixed shaft and the second fixed shaft respectively by welding, thereby ensuring the stability of the connection.

[0007] From the above description, it can be seen that the installation method of the valve disc limit shaft in the prior art is complicated to operate, and a welding machine is required for auxiliary installation without damaging the sealing waterline surface, and it is very inconvenient to disassemble after installation. Therefore, the prior art has the defects of relatively complex structure, high manufacturing cost, and great difficulty in assembly and disassembly. Summary of the invention

[0008] Therefore, the technical problem to be solved by the present invention is to overcome the defects of the valve flap limiting shaft in the prior art, such as the relatively complex structure, high manufacturing cost, and great difficulty in assembly and disassembly, thereby providing a valve flap limiting shaft assembly, and also providing a valve flap structure and a check valve having the valve flap limiting shaft assembly.

[0009] A valve disc limiting shaft assembly, comprising:

[0010] Valve disc limit shaft;

[0011] At least one support seat, the support seat having a first mounting hole, a side surface of the support seat facing the valve disc limiting shaft is provided with a transverse through groove connected to the first mounting hole, and the end of the valve disc limiting shaft moves into the first mounting hole through the transverse through groove;

[0012] The stopper is arranged at the end of the valve flap limiting shaft, and includes a main body and at least two relatively arranged extension parts, wherein the extension parts have a first state in which the projection on the valve flap limiting shaft falls on the side of the support seat toward the valve flap limiting shaft, and a second state in which the projection on the valve flap limiting shaft at least partially falls in the transverse through groove.

[0013] The main body of the blocker has a through hole that matches the shape of the end of the valve flap limiting shaft. The blocker is sleeved on the end of the valve flap limiting shaft through the through hole. A limiter is provided at the end of the valve flap limiting shaft. In the second state, the limiter at least partially limits the projection of the extension part on the valve flap limiting shaft to the transverse through groove.

[0014] There are two supporting seats, which are respectively located at two ends of the valve disc limiting axis.

[0015] A key is also inserted into the transverse through groove to press the valve disc limiting shaft into the first mounting hole.

[0016] The top end surface of the transverse through groove is lower than the top horizontal plane of the first mounting hole, and / or the bottom end surface of the transverse through groove is higher than the bottom horizontal plane of the first mounting hole; and the height of the transverse through groove is not less than the minimum height of the end of the valve disc limiting shaft.

[0017] The length of the key matches the length of the transverse through slot, and the shape of the key is a rectangular parallelepiped.

[0018] A valve flap structure, comprising the above-mentioned valve flap limiting shaft assembly and a valve flap assembly;

[0019] The support seat of the valve flap limiting shaft assembly is also provided with a second mounting hole for mounting the valve flap assembly.

[0020] The valve flap assembly comprises:

[0021] The two ends of the pin are respectively inserted into the second mounting holes of the two support seats;

[0022] The left valve disc and the right valve disc are symmetrically sleeved on the pin shaft;

[0023] Torsion spring; sleeved on the pin shaft and the ends of both ends are fixed on the left valve disc and the right valve disc respectively;

[0024] The washer is sleeved on the pin shaft and arranged between the left valve disc, the right valve disc and the adjacent two of the supporting seats.

[0025] A valve comprises the above-mentioned valve flap structure and a valve body.

[0026] In the valve, a longitudinal through groove is arranged on the side surface of the support seat adjacent to one side of the valve body, and the bottom end of the longitudinal through groove passes through the support seat; a first fixing pin connected to the valve body is inserted into the longitudinal through groove.

[0027] A first clamping groove is arranged at a position on the valve body corresponding to the longitudinal through groove, one end of the first fixing pin is inserted into the first clamping groove, and the other end of the first fixing pin is located in the longitudinal through groove.

[0028] The width of one end of the first fixing pin extending into the longitudinal through slot matches the width of the longitudinal through slot.

[0029] A second clamping groove is arranged at a position on the valve body corresponding to the first mounting hole, and a second fixing pin suitable for being inserted into the first mounting hole and extending into the upper clamping groove is also arranged on the first mounting hole.

[0030] The end portion of the second fixing pin extending into the first mounting hole abuts against the end surface of the valve disc limiting shaft.

[0031] 1. The present invention provides a valve flap limiting shaft assembly, which can effectively install the valve flap limiting shaft on the valve body through the cooperation between the transverse through groove and the stopper; that is, when the stopper is in the first state, there is a distance between the projection of the stopper as a whole on the valve flap limiting shaft and the end of the valve flap limiting shaft extending into the transverse through groove on the support seat, which will not affect the movement of the end of the valve flap limiting shaft in the transverse through groove. Therefore, the end of the valve flap limiting shaft can be inserted from the side of the support seat through the transverse through groove and moved to the first mounting hole. At this time, by changing the state of the extension section on the stopper, that is, by bending the extension section so that its projection covers or partially covers the transverse through groove, the valve flap limiting shaft with a heavy transverse through groove can be prevented from escaping from the transverse through groove. Compared with the valve flap limiting shaft disclosed in the prior art, the structure of the present invention is simpler, and the structure of the assembly accessories is simpler, so that the manufacturing is simpler, the cost is lower, and the installation difficulty of the valve flap limiting shaft is simplified.

[0032] 2. The setting of the key in the present invention, especially the optimized setting of the key shape and length, can effectively make the end of the valve flap limit shaft more stably confined in the first mounting hole, avoid the movement of the end of the valve flap limit shaft in the transverse through groove, make it more stable when used, and effectively extend the overall life of the structure.

[0033] 3. A valve provided by the present invention has any of the advantages described above for the above components because the valve adopts the above fixing structure.

[0034] 4. The longitudinal through groove arranged on the support seat in the present invention, the first fixing pin matched with the longitudinal through groove, and the second fixing pin installed in the first mounting hole can all better cooperate with the above-mentioned valve disc limiting shaft assembly in the present invention, effectively realize the positioning of the support seat on the valve body, and enable the valve disc limiting shaft assembly of the present invention to be more stably fixed on the valve body without destroying the waterline surface, and can further simplify the overall installation steps, and also facilitate the disassembly of each component in the present invention. During the specific installation, it is only necessary to first install the first fixing pin in the first slot of the valve body, and then install the assembled valve disc assembly in the second mounting hole of the support seat, align the longitudinal through groove of the support seat assembled with the valve disc assembly with the first fixing pin and insert it into the valve body, and then insert the second fixing pin into the first slot of the valve body through the first mounting hole, and finally install the valve disc limiting shaft in the first mounting hole according to the installation method of the above-mentioned valve disc limiting shaft, which is very convenient to operate, and the limiting effect of up and down, left and right, front and back after installation is very significant, and the stability is very excellent.

[0035] 5. The valve provided by the present invention adopts a purely mechanical structure to connect the various components, which is safe and reliable. The structure of the present invention does not have any external leakage points. The structure of the present invention does not need to destroy the waterline surface of the valve body. It has fewer parts, a simple structure, simple processing of each part, convenient installation, stability and reliability, and lower cost. BRIEF DESCRIPTION OF THE DRAWINGS

[0036] In order to more clearly illustrate the specific implementation methods of the present invention or the technical solutions in the prior art, the drawings required for use in the specific implementation methods or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are some implementation methods of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0037] Figure 1 A schematic cross-sectional structure diagram of a check valve provided by the present invention Figure 1 ;

[0038] Figure 2 A schematic cross-sectional structure diagram of a check valve provided by the present invention Figure 2 ;

[0039] Figure 3 for Figure 1 A top view of the structural schematic diagram shown;

[0040] Figure 4 It is a schematic diagram of the structure at the position of the blocking member in the present invention;

[0041] Figure 5 It is a schematic diagram of the front surface structure of the blocking member in the present invention;

[0042] Figure 6 The schematic diagram of the longitudinal section structure of the blocking member in the present invention is a side view;

[0043] Description of reference numerals:

[0044] 1-valve body; 2-left valve disc; 3-stopper; 4-support seat; 5-right valve disc; 6-first fixing pin; 7-second fixing pin; 8-key; 9-valve disc limit shaft; 10-pin shaft; 11-washer; 12-torsion spring;

[0045] 41 - first mounting hole, 42 - second mounting hole, 43 - transverse through slot, 44 - longitudinal through slot. DETAILED DESCRIPTION

[0046] The technical solution of the present invention will be described clearly and completely below in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of them. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0047] In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc., indicating the orientation or positional relationship, are based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the present invention. In addition, the terms "first" and "second" are used for descriptive purposes only and cannot be understood as indicating or implying relative importance.

[0048] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0049] In addition, the technical features involved in the different embodiments of the present invention described below can be combined with each other as long as they do not conflict with each other.

[0050] Example 1

[0051] Valve disc assembly valve body

[0052] A valve flap limiting shaft assembly comprises a valve flap limiting shaft 9, at least one supporting seat 4, and a stopper 3.

[0053] The support seat 4 has a first mounting hole 41, and a transverse through groove 43 communicating with the first mounting hole 41 is provided on the side of the support seat 4 facing the valve disc limiting shaft 9, and the end of the valve disc limiting shaft 9 moves into the first mounting hole 41 through the transverse through groove 43;

[0054] The blocking member 3 is arranged at the end of the valve flap limiting shaft 9, including a main body and at least two relatively arranged extension parts, wherein the extension parts have a first state in which the projection on the valve flap limiting shaft 9 falls on the side of the support seat 4 facing the valve flap limiting shaft 9, and a second state in which the projection on the valve flap limiting shaft 9 at least partially falls in the transverse through groove 43.

[0055] The present invention can effectively install the valve flap limiting shaft on the valve body through the cooperation between the transverse through groove and the stopper; that is, when the stopper is in the first state, there is a distance between the projection of the stopper as a whole on the valve flap limiting shaft and the end of the valve flap limiting shaft extending into the transverse through groove on the support seat, which will not affect the movement of the end of the valve flap limiting shaft in the transverse through groove. Therefore, the end of the valve flap limiting shaft can be inserted from the side of the support seat through the transverse through groove and moved to the first mounting hole. At this time, by changing the state of the extension section on the stopper, that is, by bending the extension section so that its projection covers or partially covers the transverse through groove, the valve flap limiting shaft with a heavy transverse through groove can be prevented from escaping from the transverse through groove. Compared with the valve flap limiting shaft disclosed in the prior art, the structure of the present invention is simpler, and the structure of the assembly accessories is simpler, so that the manufacturing is simpler, the cost is lower, and the installation difficulty of the valve flap limiting shaft is simplified.

[0056] In the present invention, the transverse through groove 43 can pass through both sides of the support seat 4 at both ends, or it can only pass through one side of the support seat 4, as long as the end of the valve disc limiting shaft 9 can extend into the transverse through groove 43 through the side of the support seat 4 and move to the position of the first mounting hole 41 through the transverse through groove 43.

[0057] In the present invention, the stopper 3 can be fixed on the valve flap limiting shaft 9, or can be sleeved on the valve flap limiting shaft 9, as long as the movement of the valve flap limiting shaft 9 is not affected during installation and the valve flap limiting shaft 9 can be effectively prevented from falling out of the transverse through groove 43 after installation.

[0058] For example, when the stopper 3 is fixed on the valve flap limiting shaft 9, before installation, the main body of the stopper 3 and at least two oppositely arranged extensions are located in the same plane, so as to facilitate moving the valve flap limiting shaft 9 to the first mounting hole 41. When the end of the valve flap limiting shaft 9 is already located in the first mounting hole 41, it is only necessary to bend the extensions at the opposite ends of the stopper 3 to make the stopper 3 into a U shape, thereby ensuring that the extensions cover or partially cover the transverse through groove.

[0059] Alternatively, the stopper 3 is movably connected to the end of the valve disc limiting shaft 9, such as Figure 1 - Figure 6 As shown, the main body of the stopper 3 has a through hole matching the shape of the end of the valve flap limiting shaft 9, and the stopper 3 is sleeved on the end of the valve flap limiting shaft 9 through the through hole. A limiter is provided at the end of the valve flap limiting shaft 9. In the second state, the limiter limits the projection of the extension part on the valve flap limiting shaft 9 at least partially in the transverse through groove.

[0060] The shape of the through hole of the stopper 3 described in the present invention matches the shape of the end of the valve disc limiting shaft 9, which means that the end of the valve disc limiting shaft 9 can pass through the through hole on the stopper 3, and when the stopper 3 is fixed, the valve disc limiting shaft 9 can only move forward and backward along the axial direction of the valve disc limiting shaft 9, and cannot move in other directions. The shape of the through hole of the stopper 3 matches the shape of the end of the valve disc limiting shaft 9, which does not mean that the shapes and sizes of the two are exactly the same.

[0061] In the present invention, the number of the support seat 4 can be set to one or two. When it is set to one, the valve disc limiting shaft 9 of the present invention needs to be installed in the valve body. It is only necessary to directly set a mounting hole for the valve disc limiting shaft 9 corresponding to the first mounting hole 41 in the valve body, and the mounting method remains unchanged. In this embodiment, the support seat 4 is preferably set to two relatively, such as Figure 1 and Figure 2 As shown, each support seat 4 has a first mounting hole 41 , and two ends of the valve disc limiting shaft 9 are fixed respectively through the two first mounting holes 41 .

[0062] Furthermore, in the present invention, the valve flap assembly can be installed to the valve body first, and then the valve flap limiting shaft assembly of the present invention can be installed, and the valve flap assembly can be fixed to the valve body through the valve flap limiting shaft assembly.

[0063] At the same time, the present invention can also install the valve flap assembly to the valve flap limiting shaft assembly of the present invention, and then fix the whole to the valve body. At this time, a second mounting hole 42 can be additionally provided on the support seat 4, and the second mounting hole 42 between the two support seats 4 is suitable for connecting the valve flap assembly. When installing the valve flap limiting shaft assembly of the present invention, it is only necessary to place the two support seats 4 with the valve flap assembly installed into the inner cavity of the valve body, and then put the stopper 3 on both ends of the valve flap limiting shaft 9, move the end of the valve flap limiting shaft 9 through the transverse through groove 43 to the first mounting hole 41, and finally bend the two ends of the stopper 3 to form an extension section that blocks the end of the valve flap limiting shaft 9 in the transverse through groove 43.

[0064] Through the arrangement of the above structure, the valve flap assembly can be effectively installed and fixed in the inner cavity of the valve body 1. It has few parts, a simple installation process, a simple structure, simple processing of each part, and convenient installation. All components are connected by a purely mechanical structure, which is safe, stable, reliable, and has a lower cost.

[0065] When the valve disc limit shaft of the valve disc assembly is installed in the valve body through the above structure of the present invention, since only the extension section on the stopper 3 is used to limit the left, right, up and down positions, it will be damaged due to long-term stress after a long period of use, thereby affecting the service life. Therefore, the present invention further increases the setting of the keyway and the key 8, and optimizes the specific setting method of the keyway and the key 8, which is as follows:

[0066] A keyway is also provided on one end of the valve flap limiting shaft 9 that is inserted into the first mounting hole 41; a key 8 is also inserted into the keyway to press the valve flap limiting shaft 9 into the first mounting hole 41. The top end surface of the transverse through groove 43 is lower than the top horizontal plane of the first mounting hole 41, or / and the bottom end surface of the transverse through groove 43 is higher than the bottom horizontal plane of the first mounting hole 41; and the height of the transverse through groove 43 is not less than the minimum height of the end of the valve flap limiting shaft 9. The length of the key 8 matches the length of the transverse through groove 43, and the shape of the key 8 is a rectangular parallelepiped; the shape of the keyway matches the shape of the key 8, such as Figure 2 and Figure 4 shown.

[0067] In the above description, the shape of the keyway matches the shape of the key 8, which means that the key 8 can be inserted into the keyway of the valve flap limiting shaft 9 through the transverse through groove 43, and the end of the valve flap limiting shaft 9 is pressed tightly in the first mounting hole 41. The shape of the keyway can be the same as or different from the shape of the key 8, as long as the key 8 can be inserted and the end of the valve flap limiting shaft 9 can be pressed tightly in the mounting hole 41.

[0068] In the present invention, the height of the key 8 can be less than or equal to the height of the transverse through groove 43. When the end of the valve flap limiting shaft 9 moves to the first mounting hole 41 and is in the final position to be fixed. If the keyway is located at the bottom and the top end face of the keyway is lower than the top end face of the transverse through groove 43, or the keyway is located at the top and the top end face of the keyway is higher than the bottom end face of the transverse through groove 43, the height of the key 8 is less than the height of the transverse through groove 43, and the height of the key 8 is equal to the height of the transverse through groove 43 minus the difference between the part higher or lower. If the keyway is located at the bottom and the top end face of the keyway is higher than or equal to the top end face of the transverse through groove 43, or the keyway is located at the top and the top end face of the keyway is lower than or equal to the bottom end face of the transverse through groove 43, the height of the key 8 is equal to the height of the transverse through groove 43. Through the optimization of the above structure, it is possible to effectively provide a better clamping force up, down, left, and right for the end of the valve flap limiting shaft 9, reduce the force borne by the stopper 3, and extend the service life of the present invention.

[0069] The specific installation process of the above structure is as follows:

[0070] Insert the two ends of the pin shaft 10 in the valve disc assembly into the second mounting hole 42 of the support seat 4 to form an assembly, and then install the assembly as a whole into the valve body 1. Sleeve the stopper 3 on the valve disc limiting shaft 9, and install the valve disc limiting shaft 9 into the support seat 4 from the side of the support seat 4. When the end of the valve disc limiting shaft 9 moves from the transverse through groove 43 of the support seat 4 to the position of the first mounting hole 41, insert the key 8 from the transverse through groove 43 into the keyway of the support seat 4. Bend the end of the stopper 3, that is, block the transverse through groove 43 with the stopper 3 to prevent the key 8 from falling out.

[0071] Furthermore, in order to achieve the purpose of making the valve disc limiting shaft 9 of the present invention more stably installed and fixed in the valve body 1, and the fixing method does not damage the water plane of the valve body 1. A longitudinal through groove 44 is provided on the side of the support seat 4 adjacent to the valve body 1, and the bottom end of the longitudinal through groove 44 passes through the support seat 4; a first fixing pin 6 connected to the valve body 1 is inserted into the longitudinal through groove 44. The width of one end of the first fixing pin 6 extending into the longitudinal through groove 44 matches the width of the longitudinal through groove 44.

[0072] During assembly, it is only necessary to align the bottom end of the longitudinal slot 44 with the first fixing pin 6 and move down the support seat 4 of the assembled valve flap assembly. The width of the end of the first fixing pin 6 matches the width of the longitudinal slot 44, which means that when the support seat 4 is moved down to the position to be positioned, the width of the end of the first fixing pin 6 is the same as the width of the longitudinal slot 44 at the corresponding position at this time. That is, the cross-section of the longitudinal slot 44 in the present invention can be a rectangular shape with a constant width, such as Figure 5 and Figure 6 As shown, it can also be set to a deformed structure with a smaller top end and a larger bottom end, such as a cone.

[0073] In order to achieve a more stable effect, the first mounting hole 41 is further provided with a second fixing pin 7 which is suitable for being inserted into the first mounting hole 41 and connected to the valve body. The end of the second fixing pin 7 which extends into the first mounting hole 41 abuts against the end surface of the valve disc limiting shaft 9. Figure 2 shown.

[0074] In the present invention, the limiting fixing structure between the support seat 4 and the valve body 1 can be the second fixing pin 7, or the first fixing pin 6, or both limiting structures are provided, such as Figure 2 Alternatively, a protrusion and a groove may be provided at the position where the bottom end of the support seat 4 contacts the bottom surface of the valve body 1 to replace the first fixing pin 6 and the longitudinal through groove 44. The above structure can realize the limiting fixation between the support seat 4 and the valve body 1 without damaging the water plane of the valve body.

[0075] Specifically, in the present invention, the first fixing pin 6 and the second fixing pin 7 are preferably cylindrical structures, and the diameters of the first fixing pin 6 and the second fixing pin 7 are respectively the same as the diameters of the first mounting hole 41 and the second mounting hole 42. The height of the transverse through slot 43 is 1 / 2 of the diameter of the first mounting hole 41, and the top end face of the transverse through slot 43 coincides with the top end face of the first mounting hole 41. The cross section of the longitudinal through slot 44 is rectangular, the width of the longitudinal through slot 44 is the same as the diameter of the second mounting hole 42, and the top end of the longitudinal through slot 44 is connected to the second mounting hole 42.

[0076] The end section of the valve flap limiting shaft 9 is semicircular, and the length of the end section of the valve flap limiting shaft 9 extending into the first mounting hole 41 is the same as the depth of the transverse through slot 43. The key 8 is in the shape of a rectangular parallelepiped, and the height of the key 8 is the same as the height of the transverse through slot 43, the thickness of the key 8 is the same as the depth of the transverse through slot 43, and the length of the key 8 is the same as the length of the transverse through slot 43. The through hole on the stopper 3 is also semicircular, and the size of the through hole is equal to the end size of the valve flap limiting shaft 9, the height of the stopper 3 is greater than the height of the transverse through slot 43, and the length of the stopper 3 is also longer than the length of the transverse through slot 43. The end section of the stopper 3 extending from the transverse through slot 43 is bent in a direction away from the valve flap assembly to form an extension section that blocks the end section of the valve flap limiting shaft 9 on the transverse through slot 43, as shown in FIG. Figure 2 and Figure 4 shown.

[0077] The specific installation process of the above structure is as follows:

[0078] First, install the first fixing pin 6 into the first slot of the valve body 1, and insert the two ends of the pin shaft 10 in the valve flap assembly into the second mounting hole 42 of the support seat 4 to assemble the assembly. Align the first fixing pin 6 with the longitudinal through slot 44 of the support seat 4, and then install the assembly as a whole into the valve body 1. Insert the second fixing pin 7 into the valve body 1 through the first mounting hole on the support seat 4. At the same time, directly put the stopper 3 on the valve flap limiting shaft 9, and then install the valve flap limiting shaft 9 into the support seat 4 from the transverse through slot 43 on the side of the support seat 4. When the end of the valve flap limiting shaft 9 moves to the position of the first mounting hole 41 in the transverse through slot 43, insert the key 8 from the transverse through slot 43 into the keyway of the support seat 4. Bend the end of the stopper 3, that is, block the transverse through slot 43 with the stopper 3 to prevent the key 8 from falling out.

[0079] Example 2

[0080] A valve flap structure comprises the valve flap limiting shaft assembly described in the above embodiment 1, and a valve flap assembly; a second mounting hole 42 for mounting the valve flap assembly is also provided on the support seat 4 of the valve flap limiting shaft assembly.

[0081] The valve flap assembly in the present invention can be any double valve flap structure in the prior art. This embodiment discloses one specific structure of the valve flap assembly, which is specifically configured as follows:

[0082] The valve disc assembly, such as Figure 1 and Figure 3 As shown, including:

[0083] The two ends of the pin shaft 10 are respectively inserted into the second mounting holes 42 of the two support seats 4;

[0084] The left valve disc 2 and the right valve disc 5 are symmetrically sleeved on the pin shaft 10;

[0085] The torsion spring 12 is sleeved on the pin 10 and the ends of both ends are fixed on the left valve disc 2 and the right valve disc 5 respectively;

[0086] The washer 11 is sleeved on the pin 10 and is arranged between the left valve flap 2, the right valve flap 5 and the supporting seat 4, which are adjacent to each other.

[0087] Example 3

[0088] A valve, preferably a check valve, comprises a valve body 1, a valve flap limiting shaft assembly and a valve flap assembly in Example 1; or comprises a valve body 1 and a valve flap structure described in Example 2.

[0089] In the present invention, a longitudinal through groove 44 is provided on the side of the support seat 4 adjacent to the valve body 1 , and the bottom end of the longitudinal through groove 44 passes through the support seat 4 ; a first fixing pin 6 connected to the valve body 1 is inserted into the longitudinal through groove 44 .

[0090] A first clamping groove is provided at a position on the valve body 1 corresponding to the longitudinal through groove 44, one end of the first fixing pin 6 is inserted into the first clamping groove, and the other end of the first fixing pin 6 is located in the longitudinal through groove 44. The width of the end of the first fixing pin 6 extending into the longitudinal through groove 44 matches the width of the longitudinal through groove 44.

[0091] A second slot is provided on the valve body 1 at a position corresponding to the first mounting hole 41, and a second fixing pin 7 is also provided on the first mounting hole 41, which is suitable for being inserted into the first mounting hole 41 and extending into the upper slot. The end of the second fixing pin 7 extending into the first mounting hole 41 abuts against the end surface of the valve disc limiting shaft 9.

[0092] In the present invention, the specific installation process of the check valve is as follows:

[0093] 1. First, install the first fixing pin 6 into the first slot of the valve body 1; at the same time, directly pass the pin shaft 10 through the ears of the left valve disc 2 and the right valve disc 5, the torsion spring 12, and the gasket 11 to form a valve disc assembly, and insert the two ends of the pin shaft 10 in the valve disc assembly into the second mounting hole 42 of the support seat 4 to assemble into an assembly.

[0094] 2. Align the longitudinal through slot 44 of the support seat 4 with the first fixing pin 6, and then install the entire assembly in step 1 into the valve body 1.

[0095] 3. Insert the second fixing pin 7 through the first mounting hole on the support seat 4 and into the second slot of the valve body 1; at the same time, directly sleeve the stopper 3 onto the valve disc limiting shaft 9;

[0096] 4. Install the valve disc limiting shaft 9 into the supporting seat 4 from the side of the supporting seat 4. When the end of the valve disc limiting shaft 9 moves from the transverse through groove 43 of the supporting seat 4 to the position of the first mounting hole 41, insert the key 8 from the transverse through groove 43 into the keyway of the supporting seat 4.

[0097] 5. Bend the end of the stopper 3 to prevent the key 8 from falling out.

[0098] During operation, the medium acts on the left valve disc 2 and the right valve disc 5, and the left and right valve discs rotate around the pin shaft 10 to open. The branch angles of the torsion spring 12 act on the left and right valve discs respectively. When the medium flows back, the valve discs reset and close under the action of the torsion spring force to prevent the medium from flowing back.

[0099] Obviously, the above embodiments are merely examples for the purpose of clear explanation, and are not intended to limit the implementation methods. For those skilled in the art, other different forms of changes or modifications can be made based on the above description. It is not necessary and impossible to list all the implementation methods here. The obvious changes or modifications derived therefrom are still within the scope of protection of the invention.

Claims

1. A valve disc limiting shaft assembly, characterized in that: include: Valve disc limiting shaft (9); at least one support seat (4), the support seat (4) having a first mounting hole (41), a side surface of the support seat (4) facing the valve disc limiting shaft (9) being provided with a transverse through groove (43) communicating with the first mounting hole (41), and an end portion of the valve disc limiting shaft (9) moving into the first mounting hole (41) through the transverse through groove (43); The stopper (3) is arranged at the end of the valve disc limiting shaft (9), comprising a main body and at least two extending parts arranged opposite to each other, wherein the extending parts have a first state in which the projection on the valve disc limiting shaft (9) falls on the side of the support seat (4) facing the valve disc limiting shaft (9), and a second state in which the projection on the valve disc limiting shaft (9) at least partially falls in the transverse through groove; The main body of the stopper (3) has a through hole matching the shape of the end of the valve disc limiting shaft (9), the stopper (3) is sleeved on the end of the valve disc limiting shaft (9) through the through hole, and a stopper is provided at the end of the valve disc limiting shaft (9), and in the second state, the stopper limits the projection of the extension portion on the valve disc limiting shaft (9) at least partially in the transverse through groove; A key (8) is also inserted into the transverse through groove (43) to press the valve disc limiting shaft (9) into the first mounting hole (41); The top end surface of the transverse through groove (43) is lower than the top horizontal plane of the first mounting hole (41), or / and the bottom end surface of the transverse through groove (43) is higher than the bottom horizontal plane of the first mounting hole (41); and the height of the transverse through groove (43) is not less than the minimum height of the end of the valve disc limiting shaft (9); There are two support seats (4), which are respectively located at two ends of the valve disc limiting shaft (9).

2. A valve disc limiting shaft assembly according to claim 1, characterized in that: The length of the key (8) matches the length of the transverse through slot (43), and the shape of the key (8) is a rectangular parallelepiped.

3. A valve flap structure, characterized in that: It comprises the valve disc limiting shaft assembly as claimed in any one of claims 1 to 2, and a valve disc assembly; The support seat (4) of the valve flap limiting shaft assembly is also provided with a second mounting hole (42) for mounting the valve flap assembly.

4. A valve flap structure according to claim 3, characterized in that: The valve flap assembly comprises: The two ends of the pin shaft (10) are respectively inserted into the second mounting holes (42) of the two supporting seats (4); The left valve disc (2) and the right valve disc (5) are symmetrically sleeved on the pin (10); A torsion spring (12) is sleeved on the pin shaft (10) and has ends thereof fixed to the left valve disc (2) and the right valve disc (5) respectively; The washer (11) is sleeved on the pin shaft (10) and is arranged between two adjacent ones of the left valve flap (2), the right valve flap (5) and the support seat (4).

5. A valve, characterized in that: It comprises a valve flap structure as claimed in claim 3 or 4, and a valve body (1).

6. A valve according to claim 5, characterized in that: A longitudinal through groove (44) is provided on a side surface of the support seat (4) adjacent to the valve body (1), and the bottom end of the longitudinal through groove (44) passes through the support seat (4); a first fixing pin (6) connected to the valve body (1) is inserted into the longitudinal through groove (44).

7. A valve according to claim 5, characterized in that: A first clamping groove is provided at a position on the valve body (1) corresponding to the longitudinal through groove (44); one end of the first fixing pin (6) is inserted into the first clamping groove, and the other end of the first fixing pin (6) is located in the longitudinal through groove (44).

8. A valve according to claim 6 or 7, characterized in that: The width of one end of the first fixing pin (6) extending into the longitudinal through slot (44) matches the width of the longitudinal through slot (44).

9. A valve according to any one of claims 5 to 7, characterized in that: A second slot is provided on the valve body (1) at a position corresponding to the first mounting hole (41), and a second fixing pin (7) suitable for being inserted into the first mounting hole (41) and extending into the second slot is also provided on the first mounting hole (41).

10. A valve according to claim 9, characterized in that: The end portion of one end of the second fixing pin (7) extending into the first mounting hole (41) abuts against the end surface of the valve disc limiting shaft (9).

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