Water stop diaphragm pump with pressure release valve

Abstract

The utility model provides a water stop diaphragm pump with a pressure release valve, which comprises a pump body, a valve stop assembly communicated with the upper end of the pump body, an end cover communicated with the upper end of the valve stop assembly, a rectangular block arranged at the upper end of the end cover, a first groove formed by the lower end face of the rectangular block in an upward concave manner, and a second hole formed by the top end face in the first groove in an upward concave manner. The front end face of the rectangular block is sunken backwards to form a third hole, a second groove and a second connecting groove, the front end of the rectangular block is detachably connected with a cover plate, and the front end of the cover plate is provided with a mounting cylinder; according to the design, a built-in structure formed by the sealing rubber head and the second elastic piece is adopted for completing pressure relief operation, the probability of defects such as leakage on the water outlet pipe is effectively reduced, the using effect is improved, and it is effectively guaranteed that normal water conveying operation can be conducted subsequently.

Description

Technical Field

[0001] The utility model discloses a water-stop diaphragm pump with a pressure relief valve, belonging to the technical field of diaphragm pumps. Background Art

[0002] The diaphragm pump uses a thin film to separate the pumped liquid from the piston and the pump cylinder, thereby protecting the piston and the pump cylinder. The left side of the diaphragm that contacts the liquid is made of corrosion-resistant materials or coated with a layer of corrosion-resistant substances; the right side of the diaphragm is filled with water or oil. At present, the externally connected water channel of the diaphragm pump is prone to closure, cutoff, semi-blockage and other phenomena during use, which leads to increased water pressure at the water outlet of the diaphragm pump. In order to protect the water outlet of the diaphragm pump, an external pressure relief device is generally installed on the water outlet of the diaphragm pump. The external pressure relief device generally uses a bolt structure for pressure relief operations, but the bolt structure is prone to loosening, etc., resulting in a high probability of defects such as leakage in the external pressure relief device, resulting in a poor use effect of the diaphragm pump, which will affect the subsequent water delivery operations of the diaphragm pump. Utility Model Content

[0003] In view of the shortcomings of the prior art, the purpose of the utility model is to provide a water-stop diaphragm pump with a pressure relief valve to solve the problems raised in the above-mentioned background technology. The utility model adopts a built-in structure formed by a sealing rubber head and a second elastic member to complete the pressure relief operation, effectively reducing the probability of defects such as leakage on the water outlet pipe, improving the use effect, and effectively ensuring that normal water delivery operations can be carried out subsequently.

[0004] In order to achieve the above-mentioned purpose, the utility model is realized through the following technical scheme: a diaphragm pump with a pressure relief valve and a water stop, comprising a pump body, a driving device is arranged at the lower end of the pump body, and the output shaft of the driving device is connected to the runner part of the pump body, the upper end of the pump body is connected to a valve stop assembly, the upper end of the valve stop assembly is connected to an end cover, and the valve stop assembly extends into the end cover, the upper end of the end cover is connected to an inlet pipe, a rectangular block is installed at the right end of the inlet pipe, and the rectangular block is arranged on the upper end of the end cover, a water outlet pipe is installed at the upper end of the rectangular block, and the lower end of the water outlet pipe passes through the rectangular block and is arranged in communication with the end cover;

[0005] The lower end surface of the rectangular block is recessed upward to form a first groove, and the first groove is connected to the end cover, the top end surface of the first groove is recessed upward to form a second hole, the left wall surface of the first groove is recessed to the left to form a first connecting groove, and the first connecting groove is connected to the water inlet pipe, the front end surface of the rectangular block is recessed backward to form a third hole, and the third hole is connected to the second hole, the front end surface of the rectangular block is recessed backward to form a second groove, and the second groove is located on the right side of the third hole, the second groove is connected to the water outlet pipe, the front end surface of the rectangular block is recessed backward to form a second connecting groove, and the second connecting groove is connected and arranged between the third hole and the second groove;

[0006] The front end of the rectangular block is detachably connected to the cover plate, and the rear end of the cover plate fits the second groove, the third hole and the second connecting groove. A mounting tube is arranged at the front end of the cover plate, and the mounting tube extends to the rear end of the cover plate. The mounting tube is connected to the second groove, and a second elastic member is arranged on the front wall inside the mounting tube. A sealing rubber head is installed at the rear end of the second elastic member, and the sealing rubber head is located in the second groove.

[0007] Furthermore, the front end of the rectangular block is recessed backward to form a sealing groove, a sealing ring is mounted on the sealing groove, and the sealing ring is attached to the rear end of the cover plate, and a second groove, a second connecting groove and a third hole are arranged inside the sealing groove.

[0008] Furthermore, the end cover, water inlet pipe, rectangular block and water outlet pipe are an integrated structure, the front end of the rectangular block is recessed backward to form two positioning grooves, and the two positioning grooves are located on the upper and lower sides of the sealing groove, and two positioning plates are symmetrically arranged at the rear end of the cover plate, and the two positioning plates are respectively located in the two positioning grooves.

[0009] Furthermore, the valve stop assembly includes a valve seat, which is installed at the upper end of the pump body, the valve seat is arranged at the lower end of the end cover, and the valve seat extends into the end cover, the upper end surface of the valve seat is recessed downward to form a first hole, and the first hole passes through the valve seat and is connected to the pump body, an auxiliary pipe is arranged at the upper end of the valve seat, and the auxiliary pipe is located on the left side of the first hole, and the auxiliary pipe passes through the valve seat and is connected to the pump body.

[0010] Furthermore, a valve cover is arranged at the upper end of the valve seat, and the valve seat extends into the valve cover, the valve cover is located in the end cover, the upper end surface of the valve cover is recessed downward to form a fourth hole, the fourth hole is connected to the lower end of the water inlet pipe, and the lower end of the fourth hole is connected to the upper end of the auxiliary pipe, the upper end surface of the valve cover is recessed downward to form a fifth hole, and the fifth hole is connected to the inner cavity of the valve cover, and the upper end of the fifth hole is connected to the lower end of the water outlet pipe.

[0011] Furthermore, the upper end surface of the valve cover is recessed downward to form an installation groove, and the installation groove is located between the fourth hole and the fifth hole. An elastic sheet is installed on the inner wall of the installation groove, and a blocking block is arranged in the middle of the upper end of the elastic sheet, and the blocking block passes through the elastic sheet, and the blocking block is located directly above the first hole.

[0012] Furthermore, a first elastic member is arranged at the upper end of the blocking block, and the other end of the first elastic member is mounted on the top end inside the first groove.

[0013] Beneficial effects of the utility model:

[0014] 1. When the water pressure in the water outlet pipe increases, the sealing rubber head moves and enters the installation tube, so that the water in the water outlet pipe can flow into the water inlet pipe along the second groove, the second connecting groove, the third hole, the second hole, the first groove and the first connecting groove, so that the water in the water outlet pipe flows back into the water inlet pipe, and then the water outlet pipe is depressurized. When the water pressure in the water outlet pipe decreases, the sealing rubber head seals the second groove under the action of the second elastic member, so that the water outlet pipe can carry out normal water conveyance operation, and the built-in structure formed by the sealing rubber head and the second elastic member is used to complete the depressurization operation of the water outlet pipe, effectively reducing the probability of defects such as leakage on the water outlet pipe, improving the use effect, and effectively ensuring that normal water conveyance operation can be carried out subsequently.

[0015] 2. When the motor stops working, the water pressure in the first hole decreases. Under the action of the elastic sheet and the first elastic member, the block blocks the outlet of the first hole, thereby timely closing and cutting off the output pipeline formed by the first hole, the fifth hole and the outlet pipe, effectively avoiding dripping in the outlet pipe and effectively ensuring the use effect. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Other features, objects and advantages of the present invention will become more apparent by reading the detailed description of non-limiting embodiments with reference to the following drawings:

[0017] Figure 1 This is a schematic structural diagram of a water-stop diaphragm pump with a pressure relief valve according to the utility model;

[0018] Figure 2 This is a cross-sectional view of a water-stop diaphragm pump with a pressure relief valve according to the utility model;

[0019] Figure 3 This is an assembly diagram of an end cover, a water inlet pipe, a rectangular block and a water outlet pipe in a water-stop diaphragm pump with a pressure relief valve according to the utility model;

[0020] Figure 4 This is a three-dimensional diagram of the middle end cover of a water-stop diaphragm pump with a pressure relief valve according to the utility model;

[0021] Figure 5 for Figure 3 A cross-sectional view of

[0022] Figure 6 for Figure 5 Sectional view along AA direction;

[0023] Figure 7 for Figure 5 Cross-sectional view along the BB direction;

[0024] Figure 8 This is a three-dimensional diagram of a cover plate in a water-stop diaphragm pump with a pressure relief valve according to the utility model;

[0025] Fig. 9 This is a cross-sectional view of a cover plate in a water-stop diaphragm pump with a pressure relief valve according to the utility model;

[0026] Fig.10 This is a three-dimensional diagram of a valve cover in a water-stop diaphragm pump with a pressure relief valve according to the utility model;

[0027] Fig.11 It is a stereoscopic diagram of a valve seat in a water-stop diaphragm pump with a pressure relief valve according to the utility model.

[0028] In the figure: 1-motor, 2-valve seat, 3-end cover, 4-water inlet pipe, 5-rectangular block, 6-water outlet pipe, 7-cover plate, 8-pump body, 9-valve cover, 21-first hole, 22-auxiliary pipe, 51-first connecting groove, 52-second hole, 53-first elastic member, 54-first groove, 55-second groove, 56-second connecting groove, 57-third hole, 71-installation cylinder, 72-sealing rubber head, 73-second elastic member, 91-elastic sheet, 92-blocking block, 93-fourth hole, 94-fifth hole, 501-sealing ring. DETAILED DESCRIPTION

[0029] In order to make the technical means, creative features, objectives and effects achieved by the present invention easy to understand, the present invention is further described below in conjunction with specific implementation methods.

[0030] See also Figure 1 , Figure 2 , Figure 3 , Figure 4 , Figure 5 , Fig.10 and Fig.11 The utility model provides a technical solution: a water-stop diaphragm pump with a pressure relief valve, comprising a pump body 8, a driving device connecting the output shaft with the runner part of the pump body 8 is arranged on the lower end of the pump body 8, and the pump body 8 is operated by the driving device. The driving device can adopt a motor 1, and a valve seat 2 installed on the upper end of the pump body 8 and extending into the end cover 3 and the valve cover 9 is arranged on the lower end of the end cover 3, and a mounting carrier is provided for components such as an auxiliary pipe 22 through the valve seat 2, and then an auxiliary pipe 22 located on the left side of the first hole 21 and passing through the valve seat 2 and connected to the pump body 8 is arranged on the upper end of the valve seat 2, and water is transported into the pump body 8 through the auxiliary pipe 22;

[0031] The valve cover 9 located in the end cover 3 is arranged on the upper end of the valve seat 2. Through the valve cover 9, a processing carrier is provided for the fourth hole 93 and other components. The upper end surface of the valve cover 9 is recessed downward to form a fourth hole 93 whose upper end is connected to the lower end of the water inlet pipe 4 and whose lower end is connected to the upper end of the auxiliary pipe 22. Through the fourth hole 93, the water inlet pipe 4 and the auxiliary pipe 22 are connected. The upper end surface of the valve cover 9 is recessed downward to form a fifth hole 94 which is connected to the inner cavity of the valve cover 9 and whose upper end is connected to the lower end of the water outlet pipe 6. Through the fifth hole 94, the water outlet pipe 6 is connected to the inner cavity of the valve cover 9. The upper end surface of the valve seat 2 is recessed downward to form a first hole 21 which penetrates the valve seat 2 and is connected to the pump body 8. Through the first hole 21, the water in the pump body 8 is transported outward. The lower end surface of the rectangular block 5 is recessed upward to form a first groove 54 which is connected to the end cover 3. Through the first groove 54, an installation space is provided for the first elastic member 53.

[0032] The upper end surface of the valve cover 9 is recessed downward to form an installation groove located between the fourth hole 93 and the fifth hole 94. The installation groove provides an installation space for the elastic sheet 91. The elastic sheet 91 is installed on the inner wall of the installation groove. The block 92 is elastically connected to the valve cover 9 through the elastic sheet 91. The block 92 that penetrates the elastic sheet 91 and is located directly above the first hole 21 is set on the middle part of the upper end of the elastic sheet 91. The first hole 21 is blocked by the block 92. Then, the first elastic member 53 whose other end is installed on the top of the first groove 54 is set on the upper end of the block 92. The block 92 is connected to the end cover 3 through the first elastic member 53. The first elastic member 53 can be a spring.

[0033] The water inlet pipe 4 is connected and arranged on the upper end of the end cover 3. Water inlet movement is realized through the water inlet pipe 4. The rectangular block 5 arranged on the upper end of the end cover 3 is installed on the right end of the water inlet pipe 4. The strength of the water inlet pipe 4 and the water adding pipe is increased through the rectangular block 5. Then the water outlet pipe 6, whose lower end passes through the rectangular block 5 and is connected with the end cover 3, is installed on the upper end of the rectangular block 5. Water is transported outward through the water outlet pipe 6. The end cover 3, the water inlet pipe 4, the rectangular block 5 and the water outlet pipe 6 are integrated structure. The design of the integrated structure is convenient for production and installation.

[0034] When in use, the motor 1 is started, and the impeller of the pump body 8 is rotated, so that the external water is transported into the pump body 8 along the water inlet pipe 4, the fourth hole 93 and the auxiliary pipe 22, and the water in the pump body 8 is transported into the first hole 21, and the block 92 moves upward to the limit position under the action of the water pressure in the first hole 21, and the elastic sheet 91 is deformed outward and the first elastic member 53 is compressed, so that the elastic sheet 91 and the first elastic member 53 have elastic force. When the block 92 moves upward, the outlet of the first hole 21 is exposed, so that the water in the first hole 21 enters the valve cover 9, and the water in the valve cover 9 enters the water outlet pipe 6 through the fifth hole 94, and then the water is transported outward through the water outlet pipe 6;

[0035] When the motor 1 stops working, the water pressure in the first hole 21 decreases. At this time, under the action of the elastic force of the elastic sheet 91 and the first elastic member 53, the blocking block 92 returns to its original position and re-blocks the outlet of the first hole 21, thereby timely closing and cutting off the output pipeline formed by the first hole 21, the fifth hole 94 and the water outlet pipe 6, effectively avoiding dripping in the water outlet pipe 6, and effectively ensuring the use effect.

[0036] like Figure 1-Figure 9 As shown, the top surface of the first groove 54 is recessed upward to form a second hole 52, and the third hole 57 is communicated with the first groove 54 through the second hole 52. The left wall surface of the first groove 54 is recessed to the left to form a first connecting groove 51 connected with the water inlet pipe 4, and the first groove 54 is communicated with the water inlet pipe 4 through the first connecting groove 51. The front end surface of the rectangular block 5 is recessed backward to form a third hole 57 connected with the second hole 52, and water flows back into the second hole 52 through the third hole 57. The front end surface of the rectangular block 5 is recessed backward to form a second groove 55 located on the right side of the third hole 57 and connected with the water outlet pipe 6, and the water outlet pipe 6 is communicated with the second connecting groove 56 through the second groove 55.

[0037] A second connecting groove 56 is formed on the front surface of the rectangular block 5, which is connected to the third hole 57 and the second groove 55. The third hole 57 is connected to the second groove 55 through the second connecting groove 56. The cover plate 7 whose rear end is in contact with the second groove 55, the third hole 57 and the second connecting groove 56 is installed on the front end of the rectangular block 5 by bolts. The second connecting groove 56, the third hole 57 and the second groove 55 are blocked by the cover plate 7. A mounting tube 71 extending to the rear end of the cover plate 7 and connected to the second groove 55 is arranged on the front end of the cover plate 7. The mounting tube 71 provides an installation space for the second elastic member 73.

[0038] The second elastic member 73 is arranged on the inner front wall of the installation tube 71, and the sealing rubber head 72 is elastically connected to the installation tube 71 through the second elastic member 73. The second elastic member 73 can be a spring, and the sealing rubber head 72 located in the second groove 55 is installed on the rear end of the second elastic member 73. The second groove 55 is blocked by the sealing rubber head 72, and the front end surface of the rectangular block 5 is recessed backward to form a sealing groove with the second groove 55, the second connecting groove 56 and the third hole 57 arranged inside, and the sealing groove provides an installation space for the sealing ring 501;

[0039] The sealing ring 501 attached to the rear end of the cover plate 7 is assembled on the sealing groove. The sealing ring 501 is used to make the cover plate 7 and the rectangular block 5 sealed. The front end of the rectangular block 5 is recessed backward to form two positioning grooves located on the upper and lower sides of the sealing groove. The positioning grooves are used to provide installation space for the positioning plate. The two positioning plates respectively located in the two positioning grooves are symmetrically arranged on the rear end of the cover plate 7. The two positioning plates are used in conjunction with the two positioning grooves to position and install the cover plate 7 and the rectangular block 5.

[0040] First, place the sealing ring 501 into the sealing groove, then put the sealing rubber head 72 into the second groove 55, and then insert the two positioning plates into the two positioning grooves respectively, and make the cover plate 7 fit on the front end of the rectangular block 5, so that the cover plate 7 and the rectangular block 5 are positioned and installed, and then the cover plate 7 and the rectangular block 5 are fastened and installed by bolts, and the sealing ring 501 makes the cover plate 7 and the rectangular block 5 sealed. At this time, the sealing rubber head 72 is positioned in the second groove 55 under the action of the second elastic member 73, so that the second groove 55 is blocked by the sealing rubber head 72, so as to ensure that the water outlet pipe 6 can normally transport water outward;

[0041] When the water outlet flow path connected to the water outlet pipe 6 is closed, cut off, or half-blocked, and the motor 1 continues to work, water will be collected in the water outlet pipe 6, thereby increasing the water pressure in the water outlet pipe 6, and the sealing rubber head 72 will move outward under the action of the increased water pressure, and the second elastic member 73 will be compressed, so that the second elastic member 73 will generate elastic force;

[0042] At this time, the second groove 55 is connected to the second connecting groove 56, so that the water in the water outlet pipe 6 flows into the water inlet pipe 4 along the second groove 55, the second connecting groove 56, the third hole 57, the second hole 52, the first groove 54 and the first connecting groove 51, so that the water in the water outlet pipe 6 flows back into the water inlet pipe 4, and then the water outlet pipe 6 is depressurized, thereby protecting the water outlet pipe 6;

[0043] When the water pressure in the water outlet pipe 6 decreases, the elastic force of the second elastic member 73 will cause the sealing rubber head 72 to move backward and re-enter the second groove 55, so that the second groove 55 can be re-sealed by the sealing rubber head 72, so that the water outlet pipe 6 can carry out normal water supply operations, and the built-in structure formed by the sealing rubber head 72 and the second elastic member 73 is used to complete the pressure relief operation of the water outlet pipe 6, effectively reducing the probability of defects such as leakage on the water outlet pipe 6, improving the use effect, and effectively ensuring that normal water supply operations can be carried out subsequently.

[0044] In addition, it should be understood that although the present specification is described according to implementation modes, not every implementation mode contains only one independent technical solution. This description of the specification is only for the sake of clarity. Those skilled in the art should regard the specification as a whole. The technical solutions in each embodiment may also be appropriately combined to form other implementation modes that can be understood by those skilled in the art.

Claims

1. A water-stop diaphragm pump with a pressure relief valve, characterized in that: The pump body (8) comprises a pump body (8), a driving device is arranged at the lower end of the pump body (8), and the output shaft of the driving device is connected to the impeller part of the pump body (8); the upper end of the pump body (8) is connected to a valve stop assembly, the upper end of the valve stop assembly is connected to an end cover (3), and the valve stop assembly extends into the end cover (3); the upper end of the end cover (3) is connected to a water inlet pipe (4), a rectangular block (5) is installed at the right end of the water inlet pipe (4), and the rectangular block (5) is arranged on the upper end of the end cover (3); the upper end of the rectangular block (5) is installed with a water outlet pipe (6), and the lower end of the water outlet pipe (6) passes through the rectangular block (5) and is connected to the end cover (3); The lower end surface of the rectangular block (5) is recessed upward to form a first recessed groove (54), and the first recessed groove (54) is arranged in communication with the end cover (3); the top end surface of the first recessed groove (54) is recessed upward to form a second hole (52); the left wall surface of the first recessed groove (54) is recessed to the left to form a first connecting groove (51), and the first connecting groove (51) is arranged in communication with the water inlet pipe (4); the front end surface of the rectangular block (5) is recessed backward to form a third hole (57), and the third hole (57) is arranged in communication with the second hole (52); the front end surface of the rectangular block (5) is recessed backward to form a second recessed groove (55), and the second recessed groove (55) is located on the right side of the third hole (57); the second recessed groove (55) is arranged in communication with the water outlet pipe (6); the front end surface of the rectangular block (5) is recessed backward to form a second connecting groove (56), and the second connecting groove (56) is arranged in communication between the third hole (57) and the second recessed groove (55); The front end of the rectangular block (5) is detachably connected to the cover plate (7), and the rear end of the cover plate (7) fits the second groove (55), the third hole (57) and the second connection groove (56). The front end of the cover plate (7) is provided with a mounting tube (71), and the mounting tube (71) extends to the rear end of the cover plate (7). The mounting tube (71) is communicated with the second groove (55). The front wall of the mounting tube (71) is provided with a second elastic member (73). The rear end of the second elastic member (73) is provided with a sealing rubber head (72), and the sealing rubber head (72) is located in the second groove (55).

2. A water-stop diaphragm pump with a pressure relief valve according to claim 1, characterized in that: The front end of the rectangular block (5) is recessed backward to form a sealing groove, a sealing ring (501) is mounted on the sealing groove, and the sealing ring (501) is attached to the rear end of the cover plate (7), and a second groove (55), a second connecting groove (56) and a third hole (57) are arranged inside the sealing groove.

3. A water-stop diaphragm pump with a pressure relief valve according to claim 2, characterized in that: The end cover (3), the water inlet pipe (4), the rectangular block (5) and the water outlet pipe (6) are in an integrated structure. The front end of the rectangular block (5) is recessed backward to form two positioning grooves, and the two positioning grooves are located at the upper and lower sides of the sealing groove. The rear end of the cover plate (7) is symmetrically provided with two positioning plates, and the two positioning plates are respectively located in the two positioning grooves.

4. A water-stop diaphragm pump with a pressure relief valve according to claim 1, characterized in that: The valve stop assembly comprises a valve seat (2), wherein the valve seat (2) is mounted on the upper end of the pump body (8), the valve seat (2) is arranged at the lower end of the end cover (3), and the valve seat (2) extends into the end cover (3), the upper end surface of the valve seat (2) is recessed downward to form a first hole (21), and the first hole (21) passes through the valve seat (2) and is arranged in communication with the pump body (8), an auxiliary pipe (22) is arranged at the upper end of the valve seat (2), and the auxiliary pipe (22) is located on the left side of the first hole (21), and the auxiliary pipe (22) passes through the valve seat (2) and is arranged in communication with the pump body (8).

5. A water-stop diaphragm pump with a pressure relief valve according to claim 4, characterized in that: A valve cover (9) is arranged at the upper end of the valve seat (2), and the valve seat (2) extends into the valve cover (9). The valve cover (9) is located inside the end cover (3). The upper end surface of the valve cover (9) is recessed downward to form a fourth hole (93). The fourth hole (93) is arranged in communication with the lower end of the water inlet pipe (4), and the lower end of the fourth hole (93) is arranged in communication with the upper end of the auxiliary pipe (22). The upper end surface of the valve cover (9) is recessed downward to form a fifth hole (94), and the fifth hole (94) is arranged in communication with the inner cavity of the valve cover (9), and the upper end of the fifth hole (94) is arranged in communication with the lower end of the water outlet pipe (6).

6. A water-stop diaphragm pump with a pressure relief valve according to claim 5, characterized in that: The upper end surface of the valve cover (9) is recessed downward to form a mounting groove, and the mounting groove is located between the fourth hole (93) and the fifth hole (94). An elastic sheet (91) is installed on the inner wall of the mounting groove. A blocking block (92) is provided in the middle of the upper end of the elastic sheet (91), and the blocking block (92) passes through the elastic sheet (91). The blocking block (92) is located directly above the first hole (21).

7. A water-stop diaphragm pump with a pressure relief valve according to claim 6, characterized in that: A first elastic member (53) is disposed at the upper end of the blocking block (92), and the other end of the first elastic member (53) is mounted on the top end inside the first groove (54).

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