Improved stop valve

Abstract

The utility model discloses an improved stop valve which comprises a valve body, a water passing channel formed in the valve body and a valve element assembly arranged on the valve body, a partition plate is welded and fixed in the valve body, the partition plate divides the water passing channel into a water inlet channel and a water outlet channel, and the partition plate comprises a first bent part, a connecting part and a second bent part. One end of the partition plate is bent towards a first direction to form a first bent part, the other end of the partition plate is bent towards a second direction to form a second bent part, the first direction is opposite to the second direction, and the edge of the partition plate makes contact with the inner wall of the valve body and is welded and fixed; a valve port is formed in the connecting part and is in sealing fit with the valve element assembly. The two ends of the partition plate are bent and fixedly welded in the valve body, the partition plate can be quickly and conveniently installed and fixed in the valve body, the process requirement is low, welding and fixing are firm, and reliability is high.

Description

Technical Field

[0001] The utility model relates to the technical field of check valves, in particular to an improved stop valve. Background Art

[0002] At present, in the household water supply pipeline system, the stop valve is widely used as a valve for switching water flow at the front end of the pipeline. For example, the Chinese patent with the publication number CN208417543U discloses a stop valve, including: a valve body and a valve cover connected to the valve body; a valve flap, the valve flap is located in the cavity formed by the valve body and the valve cover; a valve stem, the valve stem includes a first part connected to the valve flap, a second part pressing against the inner wall of the valve cover, and a third part protruding from the valve cover; a magnetic component, the magnetic component is connected to the third part and selectively connected to the valve cover; and a key component; the valve body includes a first baffle and a second baffle forming a Z-shaped flow channel, one end face of the first baffle and one end face of the second baffle are jointly constructed as a support surface, and a stop ring protruding from the support surface is provided on the support surface; the other end of the valve flap is embedded with a first sealing member, one end face of the first sealing member abuts against the valve flap, and the other end face of the first sealing member selectively abuts against the support surface. In the prior art, a stamping method is adopted to form the first baffle and the second baffle, and the two baffles together form a supporting surface and a valve flap to achieve sealing cooperation.

[0003] However, the above-mentioned stop valve has the following disadvantages: since the first baffle and the second baffle are formed by integrally stamping the valve body using a hot stamping process, the stamping process is complicated, the pressure control requirements during stamping are high, and the reliability is poor. Utility Model Content

[0004] In order to overcome the above-mentioned deficiencies in the prior art, the utility model provides an improved stop valve, which has the effects of easy installation and high reliability.

[0005] The technical solution of the utility model to solve its technical problem is: an improved stop valve, including a valve body, a water passage opened in the valve body, and a valve core assembly arranged on the valve body, a partition is welded and fixed in the valve body, the partition divides the water passage into a water inlet channel and a water outlet channel, the partition includes a first bending portion, a connecting portion, and a second bending portion, one end of the partition is bent in a first direction to form the first bending portion, and the other end of the partition is bent in a second direction to form the second bending portion, the first direction and the second direction are opposite to each other, the edge of the partition is in contact with the inner wall of the valve body and is welded and fixed; the connecting portion is provided with a valve port, and the valve port is sealed and matched with the valve core assembly.

[0006] By adopting the above technical scheme, the two ends of the partition in sheet form after stamping are bent respectively, so that the first bent portion is upward relative to the connecting portion, and the second bent portion is downward relative to the connecting portion, and the partition as a whole is roughly Z-shaped, and then the partition is axially installed in the valve body from the water passage, so that the valve port corresponds to the valve core assembly, and the outer edges of the first bent portion, the second bent portion and the connecting portion are all tightly attached to the inner wall of the valve body. The tightly attached edges are fixed by welding, so that the partition can be quickly and conveniently installed and fixed in the valve body, the process requirements are low, the welding fixation is firm, and the reliability is strong.

[0007] Preferably, the first bending portion and the second bending portion are both perpendicular to the connecting portion.

[0008] Preferably, the connecting portion is provided with an annular groove, the annular groove is provided around the outer periphery of the valve port, and a sealing ring is embedded in the annular groove.

[0009] By adopting the above technical solution, the sealing ring can be sealed and matched with the valve core component to improve the sealing performance.

[0010] Preferably, a mounting sleeve is welded and fixed on the valve body, the valve core assembly is fixedly installed in the mounting sleeve, and the outer edge of the sleeve opening and / or the inner edge of the sleeve opening that contact the valve body are laser welded to the outer wall of the valve body.

[0011] By adopting the above technical solution, the installation sleeve made of the pipe is fixed to the outer wall of the valve body by welding. The valve body and the installation sleeve are both formed by cutting the pipe, which greatly reduces the material cost. On the other hand, fixing by laser welding is not only more convenient to process, but also more efficient.

[0012] Preferably, connectors are welded and fixed at both ends of the valve body, an outer wall of the connector is provided with an external thread, and an inner wall of the connector is configured as a conical surface that expands from the inside to the outside.

[0013] By adopting the above technical solution, compared with the one-piece molding in the prior art, the connector and the valve body are separated, and the external thread on the connector and the valve body can be processed synchronously, thereby improving production efficiency.

[0014] Preferably, stop steps are provided at both ends of the valve body, and the connecting head is correspondingly provided with a stop limit part, the stop limit part cooperates with the stop step, the edge where the stop step contacts the stop limit part is fixed by laser welding, and the edge where the conical surface of the connecting head contacts the inner wall of the valve body is fixed by laser welding.

[0015] By adopting the above technical solution, the setting of the stop step can achieve a better positioning effect on the installation of the connector, preventing the connection between the connector and the valve body from being offset during the laser welding process, thereby ensuring high quality of welding.

[0016] Preferably, the first bending portion and the second bending portion are provided with positioning protrusions, and a slide groove with one end open and the other end closed is correspondingly provided on the inner wall of the valve body, and the slide groove is parallel to the axis of the valve body. When the positioning protrusion slides into place along the slide groove, the positioning protrusion is positioned by a stopper at the closed end of the slide groove.

[0017] By adopting the above technical solution, when the partition is installed in the valve body, since the closed end of the slide groove is positioned with the positioning protrusion stop, it is convenient for the installer to quickly identify the installation position of the partition, which is beneficial to the alignment of the valve port and the valve core assembly, thereby greatly improving work efficiency and product qualification rate.

[0018] Preferably, the valve body is in a circular tubular shape, and the outer edges of the first bending portion and the second bending portion away from the connecting portion are arc-shaped. The outer edges of the first bending portion and the second bending portion are provided with embedding grooves, and a sealing member is embedded in the embedding groove. The sealing member is sealed with the inner wall of the valve body, and both side surfaces of the first bending portion and the second bending portion are welded and fixed to the inner wall of the valve body.

[0019] By adopting the above technical solution, a three-layer sealing structure is adopted between the partition and the valve body, which greatly improves the leakage prevention effect.

[0020] Preferably, the partition is set as a stainless steel plate, the outer edges of the first bending portion and the second bending portion are cut and folded 30-60° to both sides to form flanges, and the sealing member is arranged in the groove with a triangular cross-section.

[0021] By adopting the above technical solution, when the external ambient temperature is lower than 0°C, the residual water in the valve body is easy to freeze. After freezing, the volume of the ice increases, forming an extrusion pressure on the flange, and the flange squeezes the seal to make it squeezed towards the inner wall of the valve body. In this way, even if the welding parts between the first bend part, the second bend part and the valve body are broken due to freezing, the seal can be squeezed outward to achieve a higher sealing performance, thereby preventing water leakage after freezing. The partition is made of stainless steel plate, which can continue to maintain the state of squeezing after being squeezed.

[0022] Preferably, the sealing member is configured as a sealing ring with a C-shaped cross-section, the opening side of the sealing ring is opposite to the inner side of the groove, and the outer wall of the sealing ring is respectively against the inner wall of the valve body and the flanges on both sides.

[0023] By adopting the above technical solution, the C-shaped sealing ring is more likely to deform outwards after being subjected to extrusion force.

[0024] The beneficial effects of the utility model are:

[0025] 1. The two ends of the partition are bent and welded to the valve body, so that the partition can be quickly and conveniently installed and fixed in the valve body. The process requirements are low, and the welding fixation is firm and reliable.

[0026] 2. The first bending part and the second bending part are provided with positioning protrusions, and the positioning protrusions are positioned with the stopper at the closed end of the slide groove of the valve body, which can facilitate the installer to quickly identify the installation position of the partition, and is conducive to the position alignment of the valve port and the valve core assembly, thereby greatly improving the work efficiency and product qualification rate;

[0027] 3. The outer edges of the first bending part and the second bending part are cut to form flanges, and a sealing ring is arranged in the groove, so that water leakage after freezing can be prevented and good sealing performance can be achieved. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] FIG1 is a schematic diagram of the overall structure of the first embodiment.

[0029] FIG. 2 is a top view of the first embodiment.

[0030] Figure 3 is Figure 2 Cross-sectional view of section AA.

[0031] FIG. 4 is a structural diagram of the valve body and the partition plate in the separated state according to the first embodiment.

[0032] FIG5 is a cross-sectional view of the second embodiment.

[0033] FIG6 is a cross-sectional view of the third embodiment.

[0034] FIG. 7 is a cross-sectional view of the fourth embodiment.

[0035] Figure 8 yes Figure 7 Magnified view of area B.

[0036] In the figure: 1. valve body; 11. water passage; 111. water inlet channel; 112. water outlet channel; 12. connecting hole; 13. stop step; 14. slide groove; 2. mounting sleeve; 3. valve core assembly; 31. valve stem; 32. valve disc; 4. partition; 41. first bending portion; 42. connecting portion; 421. valve port; 422. annular groove; 423. sealing ring; 43. second bending portion; 44. positioning protrusion; 45. embedding groove; 46. sealing element; 47. flange; 5. connector; 51. external thread; 52. stop limit portion. DETAILED DESCRIPTION

[0037] The utility model is further described in detail below in conjunction with the accompanying drawings and specific implementation methods.

[0038] Embodiment 1:

[0039] An improved check valve, as shown in Fig. 1-4, comprises a hollow cylindrical valve body 1, a water passage 11 opened in the valve body 1, a connecting hole 12 opened in the side wall of the valve body 1, a mounting sleeve 2 welded and fixed to the side wall of the valve body 1, the mounting sleeve 2 is coaxially arranged with the connecting hole 12, a valve core assembly 3 is installed in the mounting sleeve 2, and a valve stem 31 and a valve flap 32 of the valve core assembly 3 can extend into the valve body 1. The mounting sleeve 2 contacts the outer edge a of the lower sleeve opening of the valve body 1 and the inner edge b of the lower sleeve opening, and are both fixed to the outer wall of the valve body 1 by laser welding. In other embodiments, only the outer edge a of the lower sleeve opening or the inner edge b of the lower sleeve opening can be fixed to the valve body 1 by laser welding.

[0040] like Figure 3-5 As shown, a partition plate 4 made of stainless steel is welded and fixed inside the valve body 1. The partition plate 4 divides the water passage 11 into a water inlet channel 111 and a water outlet channel 112. The partition plate 4 includes a first bending portion 41, a connecting portion 42, and a second bending portion 43. One end of the partition plate 4 is bent in a first direction to form the first bending portion 41, and the other end of the partition plate 4 is bent in a second direction to form the second bending portion 43. The first direction and the second direction are opposite to each other. The first bending portion 41 and the second bending portion 43 are both perpendicular to the connecting portion 42. The edge of the partition plate 4 contacts the inner wall of the valve body 1 and is fixed by laser welding; a valve port 421 is provided at the center of the connecting portion 42, and the valve port 421 is sealed with the valve disc 32 of the valve core assembly 3. The connecting portion 42 is also provided with an annular groove 422, which is provided around the outer periphery of the valve port 421, and a sealing ring 423 is embedded in the annular groove 422. The sealing ring 423 can be sealed with the valve core assembly 3 to improve the sealing performance.

[0041] like Figure 3-4 As shown, connectors 5 are welded and fixed at both ends of the valve body 1. The connector 5 connected to the right end of the valve body 1 is a water inlet, and the connector 5 connected to the left end of the valve body 1 is a water outlet. The water inlet and the water outlet are connected to the water passage 11. The outer wall of the connector 5 is provided with an external thread 51, and the inner wall of the connector 5 is set as a conical surface that expands from the inside to the outside. Stop steps 13 are provided on the outer walls of both ends of the valve body 1. The connector 5 is correspondingly provided with a stop limit portion 52. The stop limit portion 52 is limited and matched with the stop step 13. The edge where the stop step 13 contacts the stop limit portion 52 is fixed by laser welding, and the welding position is c. The edge where the conical surface of the connector 5 contacts the inner wall of the valve body 1 is fixed by laser welding, and the welding position is d. The setting of the stop step 13 can play a good positioning effect on the installation of the connector 5, prevent the connection portion 42 between the connector 5 and the valve body 1 from being offset during the laser welding process, thereby ensuring the high quality of welding.

[0042] The installation sleeve 2 and the connector 5 made of pipe fittings are fixed to the outer wall of the valve body 1 by laser welding. The valve body 1, the installation sleeve 2 and the connector 5 are all cut from the pipe fittings and processed, which greatly reduces the material cost. On the other hand, the laser welding fixation is not only convenient for processing, but also more efficient. In addition, compared with the one-piece molding in the prior art, the installation sleeve 2, the connector 5 and the valve body 1 are split, and the external thread 51 on the connector 5, the internal thread of the installation sleeve 2 and the valve body 1 can be processed simultaneously to improve production efficiency.

[0043] The basic working principle of the utility model is: the two ends of the partition plate 4 which is in sheet form after stamping are bent respectively, so that the first bent portion 41 is upward relative to the connecting portion 42, and the second bent portion 43 is downward relative to the connecting portion 42, and the partition plate 4 is roughly Z-shaped as a whole, and then the partition plate 4 is axially installed in the valve body 1 from the water passage 11, so that the valve port 421 corresponds to the valve core assembly 3, and the outer edges of the first bent portion 41, the second bent portion 43 and the connecting portion 42 are all tightly attached to the inner wall of the valve body 1, and the tightly attached edges are fixed by welding, so that the partition plate 4 can be quickly and conveniently installed and fixed in the valve body 1, the process requirements are low, and the welding fixation is firm and the reliability is strong.

[0044] Embodiment 2:

[0045] An improved stop valve, such as Figure 5 As shown, the difference between this embodiment and the first embodiment is that: the first bending portion 41 and the second bending portion 43 are provided with positioning protrusions 44, and the upper and lower inner walls of the valve body 1 are correspondingly provided with a slide groove 14 with one end open and the other end closed, and the slide groove 14 is parallel to the axis of the valve body 1. When the positioning protrusion 44 slides into position along the slide groove 14, the positioning protrusion 44 and the closed end of the slide groove 14 are stopped and positioned. When the partition 4 is installed in the valve body 1, since the closed end of the slide groove 14 is stopped and positioned with the positioning protrusion 44, it is convenient for the installer to quickly identify the installation position of the partition 4, which is conducive to the position alignment of the valve port 421 and the valve core assembly 3, thereby greatly improving the work efficiency and product qualification rate.

[0046] Embodiment three:

[0047] An improved stop valve, such as Figure 6As shown, the difference between this embodiment and the first embodiment is that the outer edges of the first bend portion 41 and the second bend portion 43 away from the connecting portion 42 are in an arc shape, and the outer edges of the first bend portion 41 and the second bend portion 43 are provided with an embedding groove 45, and a sealing member 46 is embedded in the embedding groove 45. The sealing member 46 is sealed with the inner wall of the valve body 1, and the two side surfaces of the first bend portion 41 and the second bend portion 43 are welded and fixed to the inner wall of the valve body 1. A three-line sealing structure is adopted between the partition 4 and the valve body 1, which greatly improves the anti-leakage effect. In other embodiments, the embedding groove 45 can be provided on the outer edges of the first bend portion 41, the second bend portion 43 and the connecting portion 42, and the sealing member 46 is embedded in the entire outer edge of the partition 4 to improve the overall sealing performance.

[0048] Embodiment 4:

[0049] An improved stop valve, such as Figure 7-8 As shown, the difference between this embodiment and the first embodiment is that the outer edges of the first bending portion 41 and the second bending portion 43 are cut along the arc surface and folded 30-60 degrees to both sides to form flanges 47, and the sealing member 46 is arranged in the groove with a triangular cross section. The sealing member 46 can be set as a sealing ring 423 with a C-shaped cross section, the opening side of the sealing ring 423 is opposite to the inner side of the groove, and the outer wall of the sealing ring 423 is respectively against the inner wall of the valve body 1 and the flanges 47 on both sides.

[0050] When the external ambient temperature is lower than 0°C, the water retained in the valve body 1 is easy to freeze. After freezing, the volume of the ice cubes increases, forming an inward extrusion force on the flange 47. The flange 47 squeezes the seal 46 to squeeze it toward the inner wall of the valve body 1. In this way, even if the welding parts between the first bend 41, the second bend 43 and the valve body 1 are broken due to freezing, the seal 46 is squeezed outward to play a better sealing role, thereby preventing water leakage after freezing. The partition 4 is made of stainless steel plate, which can continue to maintain the state of squeezing after being squeezed. The C-shaped sealing ring 423 makes it easier to deform outward after being squeezed.

[0051] The above is only a preferred embodiment of the utility model and does not limit the utility model in any way. Any simple modification, change and equivalent structural change made to the above embodiment according to the technical essence of the utility model still falls within the protection scope of the technical solution of the utility model.

Claims

1. An improved stop valve, comprising a valve body (1), a water passage (11) provided in the valve body (1), and a valve core assembly (3) provided in the valve body (1), characterized in that: A partition (4) is welded and fixed inside the valve body (1), and the partition (4) divides the water passage (11) into a water inlet passage (111) and a water outlet passage (112). The partition (4) comprises a first bending portion (41), a connecting portion (42), and a second bending portion (43). One end of the partition (4) is bent in a first direction to form the first bending portion (41), and the other end of the partition (4) is bent in a second direction to form the second bending portion (43). The first direction and the second direction are opposite to each other. The edge of the partition (4) contacts the inner wall of the valve body (1) and is welded and fixed. The connecting portion (42) is provided with a valve port (421), and the valve port (421) is sealed and matched with the valve core assembly (3).

2. An improved stop valve according to claim 1, characterized in that: The first bending portion (41) and the second bending portion (43) are both perpendicular to the connecting portion (42).

3. An improved stop valve according to claim 1, characterized in that: The connecting portion (42) is provided with an annular groove (422), the annular groove (422) is provided around the outer periphery of the valve port (421), and a sealing ring (423) is embedded in the annular groove (422).

4. An improved stop valve according to claim 1, characterized in that: A mounting sleeve (2) is also welded and fixed on the valve body (1), and the valve core assembly (3) is fixedly installed in the mounting sleeve (2). The mounting sleeve (2) contacts the outer edge of the sleeve opening and / or the inner edge of the sleeve opening of the valve body (1) and is laser welded to the outer wall of the valve body (1).

5. An improved stop valve according to claim 1, characterized in that: Connectors (5) are welded and fixed at both ends of the valve body (1); an outer wall of the connector (5) is provided with an external thread (51); and an inner wall of the connector (5) is provided with a conical surface that expands from the inside to the outside.

6. An improved stop valve according to claim 5, characterized in that: The valve body (1) is provided with stop steps (13) at both ends, and the connecting head (5) is correspondingly provided with a stop limiting portion (52), the stop limiting portion (52) and the stop step (13) are limited and matched, the edge where the stop step (13) contacts the stop limiting portion (52) is fixed by laser welding, and the edge where the conical surface of the connecting head (5) contacts the inner wall of the valve body (1) is fixed by laser welding.

7. An improved stop valve according to any one of claims 1 to 6, characterized in that: The first bending portion (41) and the second bending portion (43) are provided with positioning protrusions (44), and the inner wall of the valve body (1) is correspondingly provided with a slide groove (14) with one end open and the other end closed, and the slide groove (14) is parallel to the axis of the valve body (1). When the positioning protrusion (44) slides into place along the slide groove (14), the positioning protrusion (44) and the closed end of the slide groove (14) are stopped and positioned.

8. An improved stop valve according to any one of claims 1 to 6, characterized in that: The valve body (1) is in the shape of a circular tube. The outer edges of the first bending portion (41) and the second bending portion (43) away from the connecting portion (42) are in the shape of an arc. The outer edges of the first bending portion (41) and the second bending portion (43) are provided with an embedding groove (45). A sealing member (46) is embedded in the embedding groove (45). The sealing member (46) is in sealing cooperation with the inner wall of the valve body (1). Both side surfaces of the first bending portion (41) and the second bending portion (43) are welded and fixed to the inner wall of the valve body (1).

9. An improved stop valve according to claim 8, characterized in that: The partition (4) is a stainless steel plate, the outer edges of the first bending portion (41) and the second bending portion (43) are cut and folded 30-60 degrees to both sides to form flanges (47), and the sealing member (46) is arranged in the channel of the embedding groove (45) with a triangular cross section.

10. An improved stop valve according to claim 9, characterized in that: The sealing member (46) is configured as a sealing ring (423) having a C-shaped cross section, the opening side of the sealing ring (423) being opposite to the inner side of the groove, and the outer wall of the sealing ring (423) being respectively against the inner wall of the valve body (1) and the flanges (47) on both sides.

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