Novel urea pump assembly

Abstract

The utility model relates to the field of urea pumps, in particular to a novel urea pump assembly which comprises a pump body and two air path pipes installed at an air inlet of an air inlet equipment end on the pump body. The two gas path pipes comprise gas inlet ends, locking ends and gas outlet ends, the gas outlet ends are installed on gas inlets of the gas inlet equipment ends, the locking ends are arranged at the tops of the gas outlet ends, and the gas inlet ends are arranged at the tops of the locking ends; the air inlet end comprises a steel pipe, an air inlet connector is arranged at the top end of the steel pipe, a positioning plate is arranged on the outer side wall of the steel pipe, and threads are formed in the outer side wall of the steel pipe. The connecting relation that the clamping sleeve and the clamping ring are mutually clamped and limited through pushing of the steel sleeve is adopted, sealing and stability after connection are improved, and the problems that in the prior art, after a connector is fixed, disassembly is difficult, the connector is damaged due to forced disassembly, the fixing reliability of the connector which is easy to disassemble is low, and disassembly is not convenient are solved. And the failure rate of long-time use is difficult to guarantee.

Description

Technical Field

[0001] The utility model relates to the field of urea pumps, in particular to a novel urea pump assembly. Background Art

[0002] The urea pump assembly is a device used to transport urea solution and is commonly found in diesel vehicles, especially those equipped with a selective catalytic reduction system. The main function of the urea pump assembly is to accurately measure the urea solution from the urea tank and transport it to the SCR system to reduce nitrogen oxide emissions in the exhaust gas and meet environmental protection standards.

[0003] The inlet and outlet of the air pipe of the existing urea pump assembly usually need to be connected to an external ventilation pipe. Usually, the air pipe and the external ventilation pipe are connected by a joint. However, after the existing joint is fixed, it is difficult to disassemble it. Forced disassembly may also cause damage to the joint. The reliability of the fixing of the easily disassembled joint is low, and it is difficult to guarantee the failure rate during long-term use.

[0004] Therefore, it is necessary to invent a novel urea pump assembly to solve the above problems. Utility Model Content

[0005] The purpose of the utility model is to provide a novel urea pump assembly, which improves the sealing and stability after the connection by pushing the clamping sleeve and the clamping ring to engage with each other through the steel sleeve, so as to solve the problem in the prior art that the joint is difficult to disassemble after being fixed, and forced disassembly may also cause damage to the joint, while the reliability of the fixation of the easily disassembled joint is low, and it is difficult to ensure the failure rate for long-term use.

[0006] In order to achieve the above-mentioned object, the present invention provides the following technical solutions: a novel urea pump assembly, comprising a pump body and two air pipes installed at the air inlet of the air intake device end of the pump body;

[0007] The two air pipes include an air inlet end, a locking end and an exhaust end, wherein the exhaust end is mounted on the air inlet of the air inlet device, the locking end is located at the top of the exhaust end, and the air inlet end is located at the top of the locking end;

[0008] The air inlet end comprises a steel pipe, an air inlet interface is provided at the top of the steel pipe, a positioning plate is provided on the outer wall of the steel pipe, a thread is provided on the outer wall of the steel pipe, and a plurality of ring-shaped ferrules are provided on the side wall of the bottom end of the steel pipe;

[0009] The locking end comprises a locking sleeve threadedly mounted on a steel pipe, a steel sleeve being provided at the bottom of the locking sleeve, a groove being provided on the outer wall of the locking sleeve, and a handle wrench being hinged in the groove;

[0010] The exhaust end includes a connecting pipe connected to the air inlet of the air intake device end. The connecting pipe is provided with a plurality of clamping rings arranged in an array, and the clamping rings are in conflict with the clamping sleeve.

[0011] Preferably, the positioning plate is provided with a plurality of rectangular openings for cooperating with the grip wrench, and one end of the grip wrench is clamped in the positioning plate;

[0012] Two symmetrically arranged and elastically retractable positioning blocks are provided on the inner side wall of the rectangular opening;

[0013] The clamping sleeve is provided with a clamping tooth, and the clamping tooth and the clamping ring are engaged with each other. A sealing rubber ring is provided in the clamping sleeve, and the sealing rubber ring is arranged on the inner top wall of the clamping sleeve.

[0014] Preferably, the bottom end size of the ferrule is larger than the top end size.

[0015] Preferably, the cross-section of the steel sleeve is trapezoidal.

[0016] Preferably, a plurality of rubber rings are sleeved on the side wall of the bottom end of the steel pipe.

[0017] Preferably, a plurality of annular grooves cooperating with the rubber rings are provided on the inner side wall of the connecting pipe.

[0018] In the above technical solution, the technical effects and advantages provided by the utility model are:

[0019] 1. The steel sleeve is used to push the clamping sleeve and the clamping ring to engage with each other. After the steel sleeve is rotated until it can no longer be pushed, one end of the grip wrench is clamped in the rectangular opening of the positioning plate. The elastically retractable positioning block is used to limit the grip wrench so that one end of the grip wrench is always located in the rectangular opening. This ensures that the connection end of the device will not become loose due to vibration or other conditions during use, which may cause gas leakage at the connection point of the device, thereby improving the sealing and stability after the connection.

[0020] 2. The connection structure is simple, and the disassembly and installation operations are convenient. The sealing rubber ring fits the connecting pipe, which can ensure the sealing effect after connection and the firmness after installation. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments. Obviously, the drawings described below are only some embodiments described in the present invention. For ordinary technicians in this field, other drawings can also be obtained based on these drawings.

[0022] Figure 1 This is a schematic diagram of the overall three-dimensional structure of the utility model;

[0023] Figure 2 This is a schematic diagram of the three-dimensional structure of the gas pipe of the utility model;

[0024] Figure 3 This is a schematic diagram of the cross-sectional structure of the gas pipe of the utility model;

[0025] Figure 4 for Figure 3 Enlarged structural diagram at point A in the middle.

[0026] Description of reference numerals:

[0027] 1. Pump body; 2. Air pipe;

[0028] 21. Air inlet end; 211. Steel pipe; 212. Positioning plate; 213. Card sleeve; 2131. Card teeth;

[0029] 22. Locking end; 221. Locking sleeve; 222. Steel sleeve; 223. Grip wrench;

[0030] 23. Exhaust end; 231. Connecting pipe; 232. Snap ring. DETAILED DESCRIPTION

[0031] In order to enable those skilled in the art to better understand the technical solution of the present invention, the present invention will be further described in detail below with reference to the accompanying drawings.

[0032] The utility model provides Figure 1-4 The new urea pump assembly shown in the figure includes a pump body 1 and two air pipes 2 installed on the air inlet of the air intake device end of the pump body 1; the two air pipes 2 include an air inlet end 21, a locking end 22 and an exhaust end 23, the exhaust end 23 is installed on the air inlet end of the air intake device end, the locking end 22 is located on the top of the exhaust end 23, and the air inlet end 21 is located on the top of the locking end 22; the air inlet end 21 includes a steel pipe 211, a plurality of rubber rings are sleeved on the side wall of the bottom end of the steel pipe 211, and an air inlet interface is provided on the top of the steel pipe 211 A positioning plate 212 is provided on the outer wall of the steel pipe 211, a thread is provided on the outer wall of the steel pipe 211, and a plurality of ring-shaped clamping sleeves 213 are provided on the side wall of the bottom end of the steel pipe 211; the locking sleeve 221 located in the center can be pushed up and down by manually rotating the handle wrench 223. During the process, the steel sleeve 222 can be sleeved on the clamping sleeve 213, so that the teeth 2131 in the clamping sleeve 213 are firmly locked with the clamping ring 232 to improve the connection stability after installation.

[0033] The locking end 22 includes a locking sleeve 221 threadedly sleeved on the steel pipe 211, a steel sleeve 222 is provided at the bottom of the locking sleeve 221, the cross section of the steel sleeve 222 is trapezoidal, a groove is provided on the outer wall of the locking sleeve 221, and a handle wrench 223 is hinged in the groove; the exhaust end 23 includes a connecting pipe 231 connected to the air inlet of the air intake device end, a plurality of annular grooves cooperating with the rubber ring are provided on the inner wall of the connecting pipe 231, and a plurality of snap rings 232 arranged in an array are provided on the connecting pipe 231, and the snap rings 232 and the snap rings are connected in an array. The sleeve 213 interferes; a plurality of rectangular openings that cooperate with the grip wrench 223 are provided on the positioning plate 212, and one end of the grip wrench 223 is clamped in the positioning plate 212; during installation, the grip wrench 223 can be manually pulled horizontally to facilitate manual rotation operation. After completion, the grip wrench 223 is clamped in the rectangular opening. First, it can avoid the grip wrench 223 occupying the installation space after installation. Second, the grip wrench 223 is clamped in the rectangular opening to play a limiting role, thereby avoiding loosening after installation.

[0034] Two symmetrically arranged and elastically retractable positioning blocks are provided on the inner side wall of the rectangular opening; when the handle wrench 223 is located in the rectangular opening, the elastically retractable positioning blocks can limit the handle wrench 223 when they pop up.

[0035] A latching tooth 2131 is provided on the ferrule 213, and the latching tooth 2131 and the clamping ring 232 are engaged with each other. A sealing rubber ring is provided in the ferrule 213, and the sealing rubber ring is arranged on the inner top wall of the ferrule 213. The bottom end size of the ferrule 213 is larger than the top end size; after installation, the airtightness of the installation can be improved.

[0036] This utility works as follows:

[0037] First, manually plug the exhaust end 23 into the air inlet of the air intake device; manually rotate the handle wrench 223 to drive the locking sleeve 221 to rotate, and cooperate with the interaction between the threads to make the locking sleeve 221 rotate on the steel pipe 211 and move to one side of the sleeve 213. The wide body at the bottom end of the sleeve 213 is set, so that the steel sleeve 222 pushes the teeth 2131 and the retaining ring 232 set in the sleeve 213 to engage with each other when moving toward the bottom, and cooperates with the sealing rubber ring to fit the connecting pipe 231. When the steel sleeve 222 is rotated until it can no longer be pushed, manually clamp one end of the handle wrench 223 in the rectangular opening on the positioning plate 212, and limit it by the elastically retractable positioning block.

[0038] The above description is merely illustrative of certain exemplary embodiments of the present invention. It goes without saying that those skilled in the art will be able to modify the described embodiments in various ways without departing from the spirit and scope of the present invention. Therefore, the above drawings and description are illustrative in nature and should not be construed as limiting the scope of protection of the claims of the present invention.

Claims

1. A new type of urea pump assembly, characterized by: It comprises a pump body (1) and two air pipes (2) mounted on the air inlet of the air inlet device end of the pump body (1); The two air pipes (2) include an air inlet end (21), a locking end (22) and an exhaust end (23), wherein the exhaust end (23) is mounted on the air inlet of the air inlet device, the locking end (22) is located at the top of the exhaust end (23), and the air inlet end (21) is located at the top of the locking end (22); The air inlet end (21) comprises a steel pipe (211), the top end of the steel pipe (211) is provided with an air inlet interface, the outer side wall of the steel pipe (211) is provided with a positioning plate (212), the outer side wall of the steel pipe (211) is provided with a thread, and the bottom side wall of the steel pipe (211) is provided with a plurality of ring-shaped ferrules (213); The locking end (22) comprises a locking sleeve (221) threadedly sleeved on a steel pipe (211), a steel sleeve (222) being provided at the bottom of the locking sleeve (221), a groove being provided on the outer wall of the locking sleeve (221), and a handle wrench (223) being hinged in the groove; The exhaust end (23) comprises a connecting pipe (231) connected to the air inlet of the air inlet device end. The connecting pipe (231) is provided with a plurality of clamping rings (232) arranged in an array. The clamping rings (232) are in conflict with the clamping sleeve (213).

2. A novel urea pump assembly according to claim 1, characterized in that: The positioning plate (212) is provided with a plurality of rectangular openings that cooperate with the grip wrench (223), and one end of the grip wrench (223) is clamped in the positioning plate (212); Two symmetrically arranged and elastically retractable positioning blocks are provided on the inner side wall of the rectangular opening; The clamping sleeve (213) is provided with a clamping tooth (2131), and the clamping tooth (2131) and the clamping ring (232) are engaged with each other. A sealing rubber ring is provided in the clamping sleeve (213), and the sealing rubber ring is arranged on the inner top wall of the clamping sleeve (213).

3. The novel urea pump assembly according to claim 2 is characterized in that: The bottom end size of the ferrule (213) is larger than the top end size.

4. The novel urea pump assembly according to claim 1 is characterized in that: The cross section of the steel sleeve (222) is trapezoidal.

5. The novel urea pump assembly according to claim 1 is characterized in that: A plurality of rubber rings are sleeved on the side wall of the bottom end of the steel pipe (211).

6. The novel urea pump assembly according to claim 1 is characterized in that: The inner side wall of the connecting pipe (231) is provided with a plurality of annular grooves that cooperate with the rubber rings.

Images